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View Full Version : where can I get CCD/ CMOS image sensors ?



elecrom
02-13-2008, 10:40 PM
Hello,

I am looking for low cost CCD/CMOS colour image sensors. Where can I get them in India ? Does anybody have any idea ?

rao
02-13-2008, 11:09 PM
What is the matter with you people???

Are you ignorant, plain dumb or cant read and understand english??

How many times has it been told that multiple postings are not welcome here... what do we need to do to make you guys understand???

Rao

elecrom
02-14-2008, 07:26 AM
I do agree, it was multiple posting. I was not sure where to categorize it and hence put it into two categories.

But that was not answer for my query....anyways its okey, i'll remember.

avinash_g
02-14-2008, 09:03 AM
Hi,
I think you have to open up a cheap web camera [abt Rs 400] then find the type of sensor used then go and find its datasheets.I think there are some postings here in RI abt Logitech[Not cheap] web cam image sensor.

elecrom
02-14-2008, 09:28 AM
ya i know that, however i am not able to find any shop which sells just sensor chip, as i want to make a custon image capturing device for robotics. I know about avr cam but its too expensive and i dont want to use ready-made system.

I have recently ordered micron's cmos sensor from avnet, but it cost me a lot. Effective price of the sensor(including shipment + handling) has become 4 times the one specified on web site. Thus i am searching for retail distributor in India or an online retailer, which have resonable handling and shipping charges.

rao
02-14-2008, 08:44 PM
Ok..

Have you tried opening up those intex webcams ?? they cost 250/- INR and are pretty good to experiment with, I use them mostly for all my image rec projects , they got inbuilt LED which they call "nightvision"..:D

I checked with fujitsu and other image sensor companies, they cost too much.. around 5k/-

I apologise for being really harsh in my previous post, unfortunately all my frustration came out in your thread. Thanks for a polite reply.

Rao

elecrom
02-14-2008, 10:16 PM
Actually, I want to make a device which can take very long exposure images (exp time 10 - 20 seconds), for astrophotography. I read literature on net and I found that cheap CMOS sensors are of no use as they are not at all sensitive engough for my purpose.

People indeed have tweaked existing webcams and used them for this purpose. Unfortunetly, none of those webcams are available in indian markets (see this : http://homepage.ntlworld.com/molyned/web-cameras.htm ). Logitech Quickcam pro 5000 is there but cost is just tooo high.

Cheap web cams gives lot of noise even in day light, so they are out of question for above mentioned purpose. Though I will soon try one, let us see...

So if you have idea, where can I get any of the above mentioned cams (of course within budget), then I don't need to hunt for sensor.

allbits
02-14-2008, 10:49 PM
In astro photography, more important will be your telescope, your LPR filter, and the eyepiece you use.

I know it is a robotics forum, but, still, out of curiosity, can you mention your telescope, your mount and tracking, and the target object you plan to film?

You will need a good tracking system for any multiple exposure > 10 seconds. and if it is anything greater than a magnitude 8-9, you may NOT use a CMOS array, as mentioned.

The best way is to use a digital camera, and make an adapter for your telescope. But the normal camera, <8MP usually do not have long exposure settings. I use and recommend a kodak V803 for mag<2 and a 400D or a 5D for higher mag, quality images, but at a cost.

http://www.coloursofsky.blogspot.com/

I have tired with numerous webcams, and i will tell you, you might be disappointed. Astrophotography is a costly business, if you expect a decent resolution and less photoshop work. if you plan to pursue astrophotography, go for an EOS 400D. The images normally taken by webcams and seen on the net, has been processed, or taken with a MEADE or very expensive telescopes - (READ resolution, as you might obviously be knowing) so dont let it misguide you.

elecrom
02-14-2008, 10:58 PM
Our astronomy group have celestron tracking scope, so I scope's problem will be solved.

There is a software astrosnap, which eliminates need of tracking, but you have to tweak the camera so that astrosnap can control it.

Thanks for info.

yogi
02-15-2008, 05:34 PM
i have tried to interface cmos image sensor with a microcontroller when i was in my third year. I opened intex and logitech webcam. I was not able to find the datasheet for the cmos image sensor used in intex webcam. But i was able to find one for logitech one(agilent sensor, with very well explained datasheet), but in the process of removing image sensor from board leads of the sensor broke. So i left that one wasting around Rs.1500 for the logitech quickcam express(dont remember exact name). If you want a black and white and easy one then go for game boy camera, you can find it in ebay.
http://www.geocities.com/vjkemp/gbcam.htm