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Optical Fiber Cables
Friday, September 03rd, 2010 | Author: TigerBiz

Optical Fiber Cables

“The electronics and telecom sectors merit special attention.  On 217 Information Technology Agreement (ITA) bound items, the duty is required to be brought down to nil.  Consequently, to provide a level-playing field to the domestic industry, I propose to remove the customs duty on specified capital goods and all inputs required for the manufacture of ITA bound items”

The Union Finance Minister on 28 February 2005 announced on the floor of the parliament while presenting union budget for the year 2005-06. He was implementing the Ministerial Declaration on Trade in Information Technology Products (ITA) concluded at the Singapore Ministerial Conference in December 1996. The ITA provides for participants countries to completely eliminate duties on IT products covered by the Agreement At that time, Finance Minister could not have visualized that this exemption will be a cause of great embarrassment to the premier Indian investigation agency namely Directorate of Revenue Intelligence (DRI).

Recently, Bombay High Court in the case of Vodafore Essar v Union of India [WP 8379/2008] castigated DRI in the following words:

“In these circumstances, we are clearly of the opinion that in the present case, the conduct of the DRI officers is not only high handed but it is in gross abuse of the powers vested in them under the Customs Act. It is apparent that the DRI officers in utter disregard to the order passed by the Commissioner of Customs (A), Mumbai have forced the petitioners to pay the amount by threat and coercion which is not permissible in law. Thus, the conduct of the DRI officers in the present case in collecting the amount from the petitioners towards the alleged differential duty is wholly arbitrary, illegal and contrary to law. Having terrorised the petitioners with the threat of arrest, it is not open to the DRI officers to contend that the amount has been paid by the petitioners voluntarily. We strongly condemn the high handed action of the DRI officers in totally flouting the norms laid down under the Customs Act in relation to reassessment proceedings and purporting to collect the amount even before reassessment. We hope that such incidents do not occur in the future.”

 

Besides passing severe strictures, High Court also imposed costs on the Government. The controversy evolves around the classification of telecom grade Optical Fibre Cables (“OFC”). Exemption Notification No 24/2005-Cus dated 1 March 2005 exempts goods falling under Chapter Heading 854470 and all goods imported for the manufacture of final product falling under Chapter Heading 854470. As per HSN, OFC made up of individually sheathed fibres whether or not assembled with electric conductors or fitted with connectors are classifiable under Chapter Heading 854470 whereas OFC other than those of heading 8544 are classifiable under Chapter Heading 900190.

In recent past, telephonic communication was carried across the globe by electrical signals along copper wire cables. With the advent of internet and spread of telephone facility, there was a demand for higher bandwidth i.e. capacity to carry the amount of information, which the copper wires could not fulfill. Optical fibres offer huge communication capacity and therefore nowadays widely used for telecommunication purpose. Optical fibers, thinner than a human hair, can carry huge data across the globe at the speed of light. OFC are laid under the land and sea, overhead and also used for networking of the computers. There is no doubt that OFC are backbone of the information technology and therefore should have been one of the most eligible candidates for the ITA concession.

Sadly, the destiny of OFC for exemption is not determined by the end use but by the classification. As stated above, OFC will enjoy exemption only if it is made up of individually sheathed fibres. Generally, OFC is made of a central strength member around which dual-coated optical fibers forms the main core which is filled with jelly. This main core is covered with inner and outer sheath of HDPE and Nylon. The core of the entire controversy is whether dual-coated optical fibers are individually sheathed or not or in other words whether coating can be considered as sheathing or not.

Explanatory Notes to Heading No. 85.44 states that sheathes are usually of different colours to permit identification of the fibres at both ends of the cable. Optical fibres are used mainly in telecommunication because of their capacity for transmission of data is greater than that of electric conductors. Explanatory Notes to Heading No. 90.01 states that Optical fibres drawn from glass have a very thin coating of plastics, invisible to the naked eye, which renders the fibres less prone to fracture. It further states that OFC of this heading consist of a sheath containing one or more optical fibre bundles, the fibres of which are not individually sheathed.

The classification of OFC made of dual-coated optical fibers has been a controversial issue for many countries. In India, in the case of Optel Telecommunication Ltd, Tribunal held that thin coating of UV cured acrylate on the optical fibre, invisible to eye, does not amount to sheathing. In this case, Revenue was pleading that coating of UV cured acrylate on the optical fibre should be treated as sheathing. As Revenue failed to bring any material on record to show that coating of UV cured acrylate amounts to sheathing of optical fibre cables, it was held that UV cured acrylate coating on fibers is not equivalent to sheathing.

In the case of Alcatel India Ltd, the Authority for Advance Rulings (“AAR”) held that coating was not same as a ‘sheath’, especially as coating was found to be an integral part of manufacturing process of optical fibres. In this case, it was argued on behalf of the party that UV cured acrylate on the optical fibre should be treated as sheathing. However, this AAR ruling does not have any relevance for other parties as AAR rulings are binding only on the party and the Revenue for that party as provided in Section 28J of the Customs Act and 23E of the Central Excise Act.

In United States of America, similar questions were raised by Sumitomo Electric Lightwave Corporation limited and Corning Cable Systems. US Customs vide Ruling HQ No. 963256 and 963016 both dated April 3, 2001 ruled that 62.5 microns of dual acrylate and color coatings do substantially add to the overall protection, security, and reliability of each individual optical fiber, and that the fibers are considered to be individually sheathed and same was subsequently reaffirmed in Ruling HQ No. 965593 dated 16 July 2003.

Explanatory Notes to the Combined Nomenclature of the European Communities of  subheading 8544 were amended in 2007 vide 2007/C296/02 to includes optical fibre cables, designed for example for telecommunication use, made up of optical fibres individually coated with a dual layer of acrylate polymer placed in a protective casing. The coating consists of an inner sheath of soft acrylate and an outer sheath of hard acrylate, the latter being coated by a layer of various colours.

However, in India, classification disputes will take a while to settle. There is tendency on the part of Revenue officers to blindly follow the AAR Rulings in spite of specific provision in law that such rulings are not applicable to other parties. One of my client is a manufacturer of OFC, who is also facing similar classification dispute. I submitted voluminous data to the concerned adjudicating authority to support that secondary coating is a protective cover or sheath on the fiber and therefore OFC merits classification under heading 854470. Further, samples were tested by different laboratories and 3 out of 5 laboratories found that OFC was made of individually sheathed fibers. But, without even looking at the evidence and test reports, the adjudicator blindly following AAR held that OFC should be classified under heading 900190. Similar has been the fate of Vodafore Essar in Chennai.

An optical fiber is a glass or plastic fiber that carries light along its length. Light is kept in the “core” of the optical fiber by total internal reflection. Optical fiber are used in telecommunication and networking, sensors to measure strain, temperature, pressure and other parameters, illumination, light guides in medical and imaging.

The optic fibers for telecommunication needs very thin and very long fiber running into several kilometer in length to minimize the needs for frequent joining which may result in leakage of light or hamper total internal reflection, thus causing loss of data. The greatest drawbacks of glass fiber are weak mechanical properties causing proneness to breakage and delicacy, which makes handling difficult. Glass fibers in running length packed in spool require a buffer (primary coating) to improve bending properties of glass optical fibers as very thin glass is brittle in nature.

Undersea OFC cables often face extreme change in the temperature and the difference in response to change in temperature between the glass and the buffer contribute microbending of the fibers resulting in loss of transmission. During cabling of also microbending occurs. Therefore, a sheath or protective layer was required to protect the optical fibers during handling and use of the OFC. Mr Shustack Paul J in his patent (1992) described that the secondary coating must function as a hard protective layer which allows the fiber not to be damaged during its processing and use. Corning Incorporated in patent (2004) described that the secondary coating should have the following characteristics: sufficient stiffness (i.e., modulus) to protect the encapsulated glass fiber yet enough flexibility (i.e., elongation) for handling, low water absorption, low tackiness to enable handling of the optical fiber, chemical resistance, and sufficient adhesion to the primary coating. There is unanimity among the inventors that secondary coating is a protective layer to the primary coating to enable the fibres to withstand stress caused during cabling, environment and contamination.

Departmental officers and investigation agencies have tendency to be revenue biased and therefore, they will frequently ignore any evidence which may favour the case of importer or manufacturer. Considering the key role of trade in information technology products in the development of information industries and dynamic expansion of the world economy which will raise standards of living and human welfare, 70 countries around the world has committed to completely eliminate duties on IT products. India is one of the participant countries of ITA. Expansion of the information and telecommunication infrastructure is also one of the thrust areas of the Government in recent years. Duty burden on the OFC due to classification dispute is hampering spread of the IT infrastructure. USA and EU countries have resolved this dispute. Time is ripe for the CBEC and political bosses to notice and take urgent remedial actions as India is faltering on the global commitment and world is watching India very closely in these extraordinary times of economic distress and turmoil.

The author is a member of the Institute of Chartered Accountants of India and also a member of Institute of Cost & Works Accountants of India. He has gained vast experience in the Customs, Central Excise and Service Tax while working in the Indian Customs and central Excise Department under the Ministry of Finance, Government of India. Presently he is associated with Khaitan & Co., Mumbai, India

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Most popular Zooming Lens auctions
Friday, September 03rd, 2010 | Author: TigerBiz

Most popular zooming lens eBay auctions:

NEW CANON EF100-300mm 4-5.6 USM LENS FLEX ZOOMING PCB
US $13.99
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CANON 35-70EF LENS FLEX, ZOOMING EF35-70MM MIB OEM LOOK
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JDSU, an Optical Giant, Enters the CPV Market
Friday, September 03rd, 2010 | Author: TigerBiz

JDSU, an Optical Giant, Enters the CPV Market
CPV going to where the sun is rather than where the subsidies are?
Read more on The Motley Fool

Kudos for polishing the Jewel: San Diego Optical Co.
Reader Carol Mills singled out the plantings outside San Diego Optical Co. at 7701 Fay Ave. as deserving of a Kudo. Owners Vivian and Carter Shrum operate the business that’s been in the Village since 1931. She wrote that “many people stop and say that the flowers remind them of being in Europe” while some say the colors make their whole day brighter. Others want “these colors all over the …
Read more on La Jolla Light

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3 Ft Digital Optical Fiber Optic Toslink Audio Cable
Thursday, September 02nd, 2010 | Author: TigerBiz

optical eBay auctions you should keep an eye on:

3D Car Optical USB Mouse PC Laptop notebook Computer RD
US $0.99 (0 Bid)
End Date: Saturday Sep-04-2010 22:16:12 PDT
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PINK INSIGNIA 10.0 MP DIGITAL CAMERA + 3x OPTICAL ZOOM
US $49.99 (0 Bid)
End Date: Saturday Sep-04-2010 22:16:31 PDT
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Digital Zoom Versus Optical Zoom
Thursday, September 02nd, 2010 | Author: TigerBiz

Digital Zoom Versus Optical Zoom

Many digital cameras offer both digital and optical zoom.  These two often confuse the average camera buyer, until you know what you’re looking at.

Optical zoom works much like the zoom lens on a 35 mm film camera. It changes the length of your camera’s lens and draws the subject closer to you.  The optical zoom keeps the quality of the picture. Digital zoom works differently. It simply takes the picture and crops it then enlarges the part that is left.  It causes the quality of the photo to be reduced, sometimes greatly.

What this means in terms of output is you may have a larger view of an object with the digital zoom, but chances are your image will become unfocused.  Details will become lost.  It is actually best to turn off the digital zoom feature of your camera if possible.  This will prevent you automatically zooming in too close as the digital zoom is often an extension of the optical.

There are a couple of things you can do if you want a closer view of a subject but want the quality of your picture to still be good.  Try moving in closer when you take the picture.  Often only a foot or two will do the trick.  If this isn’t possible, you can set your camera to take a picture at its highest file size.  This will result in a photo that can be cropped to include only your desired subject, yet allow for an image that is still clear.

Digital zoom has its place.  It can be used if the only destiny of your photo is the internet.  Photos online can be a much lower quality in the camera and still appear acceptable when sent through e-mail or posted on a web gallery.  If your goal is printing, however, seek a camera that has a greater optical zoom and turn off the digital zoom.  Your pictures will be better in the end, even if they are not as close up.

Digital Camera Review

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GSI Super Quality Detachable Wide Angle Lens for the iPhone 3G-3GS, Turn your iPhone into a High-End Camera!

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TV1000 4GB QuadBand Zooming Lens TV Dual SIM CELL PHONE
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T1000i Quad-Band Zooming Lens TV Dual SIM CELL PHONE FM
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Optical Zoom Support Of A Camcorder
Wednesday, September 01st, 2010 | Author: TigerBiz

Optical Zoom Support Of A Camcorder

need some information on the zooming capacity of a Digital camera. The zooming option plays a vital role in image capturing and generating a good image. This does not work if we use a weaker lens. For this to optimize my shooting what is the best recommended way to

optical Zoom Support of a Camcorder

The optics (lens, zoom) influence too much on the quality of your images. About the zoom, most manufacturers indicates the digital zoom as well and offers value for x400! In reality we must dig into the docs and see only the optical zoom which is much lower. Digital zoom is done by electronics based on the optical zoom magnification artificial pixels resulting in a very bad quality, I also recommend to deactivate the digital zoom function and you simply optical zoom which is the only true zoom.

Zoom is often taken as the ability to approach the scene, but can also move away from the reverse (wide) This is sometimes very important if for example you want to shoot in a small room a group of such person. This is often a weak point of digital camcorders. Instead of simply studying the value of Zoom, look rather focal representing optically true zoom capabilities (distance and magnification). The Focal length is defined by a minimum value (distance) and Max (magnification).
optical Zoom Support of a Camcorder

The exposure modes are important to optimize your shooting. Camcorders offer special programs for a number of conditions (cloudy, beach, snow, indoors …), the option of manual exposure setting is more important (manual diaphragm) for good image quality in any conditions. The autofocus. All camcorders have an auto-focus system, i.e. that the development is done automatically on a central area.

Most camcorders have great public sensitivity rather medium to low thus producing very noisy images when the light is not strong. This becomes especially annoying indoors or only use a torch or powerful sports can overcome this problem. The tri-CCD models often have a higher sensitivity. The sensitivity is highly linked to the size of photo-sites (CCD sensor unit). More than one sensor is large (size measured in inches) is more sensitive. More than one sensor pixel, the less sensitive.

The sensor size in pixels is also highly variable and influt directly on the details of your images. DV PAL defines 720×576 pixels (420 000 pixels) but few low-end camcorders offers sensors of this format. We must also consider the stabilizer digital gripe dangerously dimensions useful when the sensor is active. 600 000 pixels are sufficient so far for the video. Some camcorders offer 1 or 2 million pixels, these sizes are useful for the photo mode and such definition shall fall in sensitivity.

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3 smaller CCDs or 1 big CCD: which is better?
Tuesday, August 31st, 2010 | Author: TigerBiz

Question by dissident831: 3 smaller CCDs or 1 big CCD: which is better?
I’ve narrowed it down between the Panasonic GS500 and the Canon HV20, and here is one of my many dilemmas in choosing between them. the GS500 has three 1/4.7″ chips vs. the HV20 that has one big 1/2.7″ chip. the canon is HD, while the panasonic is not. but wouldn’t the 3CCDs just about equal the picture quality that the canon offers? how do they compare?

Best answer:

Answer by BWC
Half Dozen to one, 6 to another. Canon and Sony are going with the CMOS. The HV30 and the SDR12 sport improved CMOS sensors. Panasonic is sticking with the CCD’s for now. Good info here on the comparison. http://www.dalsa.com/markets/ccd_vs_cmos.asp

Know better? Leave your own answer in the comments!

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Achieving Critical Focus with DSLR Cameras
Monday, August 30th, 2010 | Author: TigerBiz

Achieving Critical Focus with DSLR Cameras

The auto-focus capability of today’s DSLR cameras easily meets the needs of the average user.  Along with such things as pre-programmed exposure modes, the auto-focus function will deliver an acceptable result most of the time.  However, reliance on this feature leaves much to be desired when critical work demands full control of every aspect of the photographic recording process.

Older film based cameras, particularly those designed from commercial use featured such things as lens barrels engraved with accurate focusing and hyperfocal distance information, split screen or similarly assisted viewfinders and readily accessible diaphragm stop-down levers or buttons.  Today many DSLR’s are supplied with zoom lenses rather than fixed focal length optics and these zoom lenses don’t have depth of field (DOF) markings or hyperfocal distance pointers, so if you want maximum control of focus, you’re on your own.

This quick article explains the concept of DOF and how to consistently apply it to your photography.  There are also two more articles following this one covering do-it-yourself depth of field testing with your lens and camera and the concept of hyperfocal distance focus. Understanding what auto focus does is critical to knowing when to turn it off and go full manual.  Trust me, you can’t critically judge DOF by looking through the viewfinder or by peeping at the captured image on the preview screen, no matter how much you magnify it.  The physics are just not in your favor.  You can however use a simple set of principals and data tables to setup your focus so it’s bang-on every time without tearing your hair out.  In the rest of this article, I’m going to give you the industrial-strength tools to understand the process and consistently guarantee your results.  So lets dive in.

For any given point (really a plane) focused on by a lens, there is an area in front of and behind that point that will be acceptably sharp-this is known as the “DOF.”  As an example, if we critically focus on an object that is 18 feet from the camera and the overall DOF is 9 feet, objects from 15 to 24 feet will be in acceptable focus.  DOF is a fixed optical principal and applies to ALL lenses at ALL TIMES regardless of lens design or what the salesman in the camera store tells you.

Further, the rule of thumb is that DOF is divided into thirds.  For any given point focused on, one third of the DOF will be in front of the critical focus point and two-thirds will be behind.  That is why in the example cited above we know that the area of focus is from 15 to 24 feet; a third of the field depth is in front and two-thirds behind the object focused on.  So, to wrap up this concept, if you are shooting a portrait and the camera is indicating focus on the nose, 1/3rd of the field depth will be in front of the plane of the nose and 2/3rd behind.  Assuming that the overall DOF is adequate your head shot will be in focus from front to back.  More on this in a bit.

Next we need to understand that DOF is determined by lens focal length, f-stop and camera to subject distance.  We can calculate the DOF for any combination of these three factors, or more conveniently we can consult tables prepared for our lenses.  I highly recommend that you at least look at the DOF tables featured on www.dofmaster.com . Upon visiting this site, you may input your camera type, the focal length of the lens and quickly output a finished table.  Obviously, for zoom lenses, input each of the prime marked settings on the lens barrel such as 17, 35, 50, 85, 100mm and print a table for each.  I have a printed set for my lenses and keep a copy in my camera bag along with a 25’ tape measure.  The tables and tape measure are the bread and butter of focus control!

Reviewing these tables you will quickly come to understand the following general optical principals:

1. Short focal length lenses give greater DOF than longer lenses.

2. Increasing the camera to subject distance increases the DOF.

3. Stopping down the lens gives greater DOF.

4. 1/3rd of the field depth is in front of the object focused on, 2/3rds is behind.

As an example, consulting a table prepared for my Canon 30D and a 50mm lens, we find that when an object is focused on at 10’ our DOF at f 2.8 is from 9’-5” to 10’-8” but when we stop down to f-16 we are in focus from 7’-4” to 15’-9”.  Quite a difference! By understanding and applying the focus tables, you take full control of the focus process to the extent that you can know the DOF and where it will fall.  This gives you real certainty in visualizing how your finished photos will look without guessing and allows you to manipulate the focus process to serve your creative ends.

The next article in this series is called “Depth of Field Testing DSLRs” and details how you can run a simple series of tests with your own camera to show how depth actually works.

There is one more condition known as hyperfocal distance that I will deal with in the third article: “DSLRs and Hyperfocal Distance.”

Finally many thanks to Don Fleming for putting up and maintaining www.dofmaster.com a wonderful site that has all sorts of free info and goodies related to DOF and related subjects.

Jeremy Myers is a wedding officiant and is the owner of Lyssabeth’s Wedding Officiants. Visit his websites at: Lyssabeth’s Oregon Wedding Officiants , Lyssabeth’s Colorado Springs Wedding Officiants and Lyssabeth’s Monterey Wedding Officiants .

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