Maker & Product name of QC Pro 9000 CMOS sensor

Please let me know the name of COMS image sensor which installed on Quickcam Pro 9000 and Quickcam Fusion.
It's very urgent!

I think it's a Sony ClearVid sensor. Not 100% sure.

Yes, I do certainly need some kind of information regarding the CMOS sensor.

I understand there may be some interests from Logitech in not sharing this info due to competitive reasons.

Would it be possible at least to know the diagonal size of the sensor? Can I assume it to be a standard 1/4" size (4.5mm diagonal)? Or at least, can it be possible to know the angle of view of the lenses?

I need that info for a project concerning optics using a webcam.

a = 2 * atan (D/2f)

a = angle of view (?)
D = Diagonal of the sensor.
f = focal length of lenses (3.7 mm in Logitech Pro 9000 and Pro for Notebooks).

Thanks in advance.

For the QCP 9000 (0990) and the Pro for Notebooks (0991) -

DFoV = 75°
EFL = 2.0mm

Thanks.

Thanks a lot. -> So far what is EFL? Focal Length? I thought Focal Length was 3.7mm.

This post was last modified: 2008-03-12 06:38 by olato.

EFL: Effective Focal Length

Thanks.

Diagonal Field of View? Quickcam Pro 9000?

By photographing a parallellogram of rulers (or straight measuring tapes), I've found that the horisontal field of view angle is 102 degrees and the vertical field of view angle is 84 degrees. This is very far from 75 degrees diagonal field of view angle!!!

I make sure the rulers are parallell and carefully measure the distance between them. I position the camera at an unknown distance from the rulers (I don't know the optical center of the camera beforehand), but try to get it in the middle of and parallell to the rulers.

I position the camera so that the measuring edges meet as closely as possible in the image. The edges of the rulers just cover each other. The diagonal lines in the figure above represent the Field of View. By looking closely at the image taken, I note the distances ad and bc in terms of millimeters, by reading off the rulers. Together with the physical distance between the rulers, I can calculate the Field of View angle with good precision. And it cannot be 75 degrees.

Any suggestion to explain this huge disparity? Does the optics project produce good results with the 75 degrees assumption?

Cheers!

This post was last modified: 2008-04-02 01:55 by camman.

My information came from a Logitech FAQ.

Only Logitech can tell you how they determined their numbers.


Thanks.

I've talked to one of our optical engineers and I was told that our lab tests confirmed the following values: DFoV = 75° and EFL = 3.7 mm. I don't know where the discrepancy comes from ...

Perhaps the FAQ is wrong with reference to the EFL?


My copy was Last Updated: 08/10/2007 09:50 AM.


Thanks.