Eyereflection problems

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i have tryed with BPW34S photodiode, and with amplifier, it worked but in that time, i had broken laser, without beam so i didnt measured distance of detection, will it work, or maybe you can provide some other name of photodiode?

Howdoes the eyework simple explanation

by D Atlı · 2020 · Cited by 5 — The main purpose of this study is to understand the effect of chromaticity combinations on depth perception.

Can you show a drawing of how you understand such a system working for you? By the way, you can't measure direction, but you may be able to compute it. Will the reflected laser light be a SINGLE beam or will it be a dispersed reflection?

HowDoes lightenterthe eye

Distance is 1-200meters, which sensor you think can fit for my case? i have readed articles, about avalance photodiods, and seems it can help me - they are used in distance measurement, but they are too expensive, min price is 20$ for one and since i dont need to measure distance, maybe i can use som eother type of photodiodes? on video used some other type of it, its not avalanche, cause i saw pcd, and there is only 2 connectors per diode, thank you for help.

10 uses of eyes

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The five senses include sight, sound, taste, hearing and touch. Sight, like the other senses is closely related to other parts of our anatomy. The eye is connected to the brain and dependent upon the brain to interpret what we see.

The James Webb Space Telescope detects near-infrared and mid-infrared wavelengths, the light beyond the red end of the visible spectrum.

I have IR laser, lets say 300mW, i need to detect reflected light of this laser, with 4 sensors, and measure direction, something similar to this project Making an infrared-guided water rocket - YouTube

not yet, i event dont know which one i need, can you suggest something please? and im not sure that IR lenses is cheap, i think on usual lense, and ir filter, whish seems like is preinstalled in my diode

Yes, but the reflection of that beam, even by a perfect front silvered mirror will no longer be a single beam. Describe the surface that will reflect the laser beam. Have you tested the reflected laser light to see if it is still a single beam. You really need to do that.

Orderinwhichlightpasses throughthe eye

yes its not singlebeam (reflection) but in this case photodiode, can help me calculate count of reflected photons catched by himself, and in this case, if photodiode directed right to the reflected dot, signal will rise, and fall down when its not direct

How do we see with our eyes

The eye works much the same as a camera. The shutter of a camera can close or open depending upon the amount of light needed to expose the film in the back of the camera. The eye, like the camera shutter, operates in the same way. The iris and the pupil control how much light to let into the back of the eye. When it is very dark, our pupils are very large, letting in more light. The lens of a camera is able to focus on objects far away and up close with the help of mirrors and other mechanical devices. The lens of the eye helps us to focus but sometimes needs some additional help in order to focus clearly. Glasses, contact lenses, and artificial lenses all help us to see more clearly.

How we see depends upon the transfer of light. Light passes through the front of the eye (cornea) to the lens. The cornea and the lens help to focus the light rays onto the back of the eye (retina). The cells in the retina absorb and convert the light to electrochemical impulses which are transferred along the optic nerve and then to the brain.

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Refraction oflight in the eyeoccurs at

Lightreflectioneyeproblem

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Almost certainly not, unless you use a high power IR laser (wear eye protection), but the project will be a great learning experience.

To detect reflected IR light outdoors requires you to distinguish it from the intense IR background from the sun and sky. The guide beam should be modulated (typically 38 to 50 kHz), as done with IR remote controls.

i think i can find a best focus distance, for some lenses, i need a lot of them actually, 4 its for one device, but i want to have many devices, i mean i need some type os lenses, which i can purchase on ali or somewhere else

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case 1 - laser i between all detectors, and signal is equal - means we are looking direct to the point. case 2 - laser is obsservable only by 2 detectors, we need to move to the left intul signal is equal, and we are on case 1.

Would an IR lens be any different than a visible light one? I know that when I do IR photography I have to correct for the fact that IR focuses a little in front of the film plane. My lenses have a pointer that corrects for that. One can use an IR filter to block some of the visible light as well.

you want to say that this small photodiode, can work for me? image640×640 22.8 KB i also understand that i need some kind of lense to catch more signal

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