Can anyone check this video?
A guy there repairs FPC and for a fine pitch alignment against LCD he uses a camera (or microscope?? ).
I am surprised how good / clear picture he has. Can anyone let me know what kind of camera he might use? Is that a camera or a microscope? CCD?CCTV?
Thank you for your feedbacks
The cameras seem to be special cameras for close up views. Technically this is likely a simple CCTV camera with a slighly non standard lens, or possibly even just more normal lense with extension tube to get a closer focuss.
They key to getting good close up pictures is to have a stable mechanical setup and penty of light, so you can use a relatively small apperture and small, but high pixel density chip. So in principle this does not have to be an expensive camera, as small aperature and small chip is what you get from cheap cam (e.g. phone, USB microscope, webcam). So no expensive large lense or large sensor is needed.
I am surprised how good / clear picture he has.
I'm surprised haw awful/blurry the picture is. Resolutions should be 640x480 or even less. Actually it looks like cameras have analog video output with BNC connector.
It looks that camera has 75 Ohm BNC connector feeding analog video out directly to monitor. Typical CCTV camera with high magnification lenses. Setup works, but is not great in terms of image quality.
Rater some kind of digital crap (like at least 10 years old cheap webcam).
Probably yes. But what kind of a good digital camera to buy? Can you advise?
The CCTV cameras have an advantage in speed - there is usually less delay in the picture. Depending on the monitor /TV used the delay can be very short. USB and similar cameras usually have some delay - this can be a problem for adjustments. The delay can get rather large with high resolution over USB as compression or reduced frame rate may be needed. So even if camera might give full HD resolution, you might end up using VGA or less to get an acceptable speed.
The limitation on CCTV is the resolution.
However at high magnification there is a natural limit on how much resolution is possible, especially if a depth of field is needed. High resolution would require a large aperture and thus very accurate focussing and thus constant adjustments - so you have to compromize. So the limitied resolution might not be the problem at high magnification.
The right camera depends on what you need - for optical feedback when moving things speed is often more important than resolution. Still pictures can use higher resolution and usually can tolerate tighter focus. So it really depends on the application. Also a lense with adjustable aperture is a good idea to adjust the depth of field - quite often rather small apertures (e.g. F/22 on a DSLR) is used despite of allready reducing the resolution this way.
I need a good resolution camera for a similar project as that in the video link.
It means I need a camera that will show
a pitch alignment of FPC (Flexible Printed Circuit )against LCD.
The pitch can be as small as 0.2mm.
Can you suggest such camera?