Simulating Star Images for Star Tracker Testing

[DhruvSorathiya]

I am working in a student satellite team and we are working on development of star tracker. So for the testing of it, we will simulate some star images on LCD, but the problem is that rays coming into the star tracker should be parallel as original stars are at infinity. So my question is that in which manner should we use collimator to make the image of LCD display at infinity..?

 

[BvU]

Hello and !

Best answer is of course: experiment!

Second best is to think of $${1\over v}+{ 1\over u }={1\over f } $$

Thin lens formula

$\$

 

[tech99]

Your star tracker is hypermetropic, or Long Sighted, so it needs a convex spectacle lens as per the above formula. If you alternatively place a lens near the LCD it would need to be very big.

 

[DhruvSorathiyaPhysic]

Yes you are absolutely right,
But I have another doubt and that let's say star tracker captures two images from a LCD without collimator and with collimator, then will there be some aberrations present if yes then how to minimize them. Original image shown to LCD will get changed due the collimator before reaching the star tracker?
Actually my college is running online and not able to do practical analysis of these things. So have to be dependent of the online source.