camera selection for screw thread analysis

[Geen]

In the Imaging source website, I haven't found any 5MP Monochrome Camera,

Please see

[muks]

I didnt suggest it for a 5mP camera but for price comparison. Check this

[Geen]

Yes, I found a progressive scan camera in the list (5MP)...Thinking that it might be useful.

Between, if my object size runs between 1 inch to 4 inch, what do say, how much I need to be the FOV for a good analysis.

[muks]

Size of smallest distinguishable Feature(edge)  = (FOV/Sensor Resolution) x 2.

[Geen]

My smallest size will be 25.4 mm,

I believe resolution means, resolution for the camera which I am going to  selected (2592 x 1944)(H*V) or is it  sensing area 5.70 x 4.28mm

Then FOV= smallest size/2 *senson Resolution

FOV = 25.4mm/2*2592

Am i correct?

[muks]

Check here. Leaving for the day now.......

And this

Message Edited by muks on 04-13-2010 06:22 PM

[BruceAmmons]

What is the smallest measurement you need to make?  For example, if you want to measure something within 0.01 mm you need 2 pixels=0.01 mm.

If the wide side of your FOV is 25.4 mm, the min sensor resolution in that direction is 25.4mm/(0.01mm/2) = 5080.

Going in the other direction with the 5 MP sensor, 25.4mm/2592 = 0.0098mm/pixel.  The smallest measurement you can accurately make is 0.0098mm*2=0.0196mm.

Bruce

[muks]

Have you finalized the FOV,WD and lens?

[Geen]

I decided a horizontal Fov of 30mm and Vertical filed of view as range between 30-70mm

Working distance as 200-300mm

Decide the lens as http://www.edmundoptics.com/onlinecatalog/displayproduct.cfm?productID=1546&PageNum=1&StartRow=1

Planning to buy AVT guppy camera-F503B(Mono chrome), suggested by the team. I hope this will work. Did you see any disadavantage for the AVT guppy.

[muks]

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Did you see any disadavantage for the AVT guppy.

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COST.........