telecentric design in digital camera lens design all the FACTS

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The links are as follows.   first the the HP Patent that is used at part of the Micro 43 standard and also used by other lens manufacturers as needed depending in lens and camera pairings.  
http://patents.com/us-6535249.html

In this link you will notice that the lens graphic shown matches up pretty much exactly to those in the the HP patent.  (HP being part of the m43 consortium) 

http://four-thirds.org/en/fourthirds/index.html


That patent is used again as part of the spec for m43 

This page shows the use of that patent in the m43 spec
Scroll down to item 3, you will see 2 graphics.  Not the start button in the top left of each graphics. clicking play does exactly what one would expect from a play button.  :-)  

http://www.four-thirds.org/en/special/microftmerit/merit2.html

I though the techies who didn't realise this type of lens design was happening might enjoy seeing this.   


The design is not required for all lenses but it is put into practice by more then m43 as needed.  

Companies like Sony (and kodak at one point) have gone to great lengths to optimize the microlens on the sensor to help with occlusion. In some cases it works just fine but it can still have issues with shorter focal length lenses.   m43 olympus and HP wanted a solution was more ideal. Why, is a question only they can answer and probably won't.   We do know that Olympus designs lens for Sony and has a history with other manufactures like Nikon.  

So since we know for a fact that telecentric design is used for some digital lenses then that also means by definition that those lenses collimate the light.  

Edmunds optics definition of telecentric.  
Telecentricity is a special property of certain multi-element lens designs in which the chief rays for all points across the object or image are collimated. For example, telecentricity occurs when the chief rays are parallel to the optical axis, in object and/or image space.

Does one need a digital lens?  no.   

Is the above the only design principle applied to making a lens more optimized for digital sensors? No.  

Do none digital lens work fine in a whole lot of cases, yup

Can optical shortcomings be corrected in post? Yup
there are lens profiles for most of the most common lenses new to old for lots of optical shortcomings.  



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