Register to reply

Calculate the appropriate dimensions for a magnifier and thin prism working together

by kingkahuka
Tags: dimensions, magnifier, prism, working
Share this thread:
Dec26-12, 09:57 PM
P: 2
Hi! :)

I'm trying to calculate the appropriate lenses to use for a project. I need to magnify a 50mm by 50mm square image that is 40mm from a magnifying lens (with a radius of 12.5mm). Due to size constraints, I also have a thin prism to redirect the light. Assume the viewer (an eye) is within a centimeter from the lens on the opposite side of the thin prism. Additionally, the lenses are centered vertically. An image is attached displaying the configuration on how it is supposed to be arranged.


1. What are the appropriate specs (magnification, focal length, etc.) for the magnifying lens to capture the entire 50x50 image, however magnify it as much as possible?

2. What angle should the thin prism be to focus approx 7mm from the current path?

3. What (if any) considerations should be taken into mind when the viewer is an eye? On the equations I've seen, they don't seem to ever talk about a person viewing through the magnifier.

4. What is the process used to calculate both the magnifying lens and thin prism?

Thank you so much for your help and enjoy your holidays!

- C
Attached Thumbnails
photo (2).jpg  
Phys.Org News Partner Physics news on
UCI team is first to capture motion of single molecule in real time
And so they beat on, flagella against the cantilever
Tandem microwave destroys hazmat, disinfects
Dec29-12, 11:43 PM
P: 2

So, I was looking at using the thin lens formula (1/s1+1/s2=1/f) and the magnification formula (-s2/s1). Do they change/should I use a different formula when a person's eye is looking through the lens? How does the focal length work with an eye?

If anybody could shed some light on this or my previous post, I'd really really appreciate it!

Thanks so much! Happy New Year!

- C

Register to reply

Related Discussions
Deviation by a thin prism Introductory Physics Homework 2
Ray tracing a thin prism General Physics 42
Questions on thin prism General Physics 1
Solve for dimensions of rectangular prism given inertia Classical Physics 3
Working out Cam dimensions General Math 3