Questions tagged [optics]
Optics is a branch of physics describing the behaviors and properties of light (electromagnetic waves). Questions regarding the properties of light, it's interactions with matter and the instruments used to detect and deflect (or concentrate) light should be posted here.
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An idea for making a 1 m long lens: collimating beams from a camera lens, transfering them over 1 m, then focusing them back to form an image
I am working on a project to build a custom lens that may need to extend to 1 m long.
I thought it would be costly to design one from scratch so I brought up some middle-school physics from the back ...
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How to find the image of an object in case of a tilted spherical mirror?
Problem
A lens is used to obtain real image of a point(/small object) at $(75,0)$. This acts as the virtual object for a convex mirror of radius of curvature $100cm$ placed at $(50,0)$ tilted at $30°$ ...
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Fixture to hold and deliver current to crystal cathode in vacuum chamber
At my internship, I have a small crystal (about 5-8mm long by 2-5mm thick) that needs to be mounted in a vacuum chamber (which is 35mm on the inner diameter) to serve as a cathode with 1.0 to 1.5A of ...
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Inline thickness measurement by optical transmission (Beer-Lambert law)
I am wondering how effective would be an inline system for thickness measurement of diffuse plastic samples based on light attenuation. Sample thickness woud be in the order of a few mm. I know that ...
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Can I increase the field of view of a lens+camera system by placing a meniscus lens in front of it?
Let's say I have a camera + lens system. The lens is a standard focal length, let's say 25 mm on a 1/2" sensor, so not wide angle. Instead of mounting a wide angle lens on the camera, would it be ...
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Optical element that selectively attenuates a wavelength band without completely blocking it
I am looking for an optical element that would allow me to selectively attenuate a given wavelength by a factor of let's say between 2 to 5 without attenuating any other wavelength.
I know that notch ...
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Optics zoom lens elements
How would I go about designing an optical zoom lens configuration that gives me around 25x zoom eg 10mm to 250mm within a package of roughly 100-150mm?
Is there a good software or calculator/optimiser ...
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Selecting Spectrometer Slit Size
I am sourcing a new spectrometer for my optics lab and I am wondering how to determine the slit size. They offer 10um, 25um, and 50um slit sizes with decreasing resolution as we go larger. I want to ...
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Optical table without holes
Most optical tables have holes. Are there also optical tables without holes? Or do these things have a different name?
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Single Photon/Electron Emitter
Is it possible to buy single photon/electron emitter in market for experimental purposes? If yes, can you please guide me where and how?
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Is there a retroreflector prism that makes incident and reflected beams collinear?
I have an application where I need to preserve the angle of incidence of a laser beam. So, I am looking at retroreflector prisms. However, the only ones that I can find translate the incident and ...
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Transferring image from one window to another
As per the diagram shown, my inside window looks out on a shared hallway, not the outside. Using mirrors or optics, I would like to be able to see the tree and sun from inside. I can't alter the ...
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Tunable phase delay for RF modulation
I've been trying to understand if there's a way to create two RF signals at the same frequency with a fixed, tunable phase delay. The goal is for one to trigger an RF-modulated laser and the other an ...
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What is the meaning of labels on the lenses, e.g. 12L and 12H on Computar M0814-MP2?
Computar M0814-MP2 lens comes with small labels attached, e.g. 12H, 12L or 15H:
What is the ...
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collapsing a telescope image cone into an optical fiber
I have an application where a telescope will be receiving light from a laser source, and I need to couple the output, which is the image cone, into an optical fiber. Does anyone have any suggestions ...
