Undergrad How to calculate the focal length and focal point of collimator?

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SUMMARY

The discussion focuses on calculating the focal length and focal point of a collimator with a diameter of 3 mm and an active detector area of 180 µm. The participants emphasize the importance of providing a sketch to clarify the setup and requirements for accurate calculations. The conversation highlights the need for precise measurements and understanding of optics principles to achieve the desired focus.

PREREQUISITES
  • Understanding of optical principles, specifically focal length calculations.
  • Familiarity with collimator design and functionality.
  • Basic knowledge of geometry related to lens systems.
  • Experience with sketching optical setups for clarity.
NEXT STEPS
  • Research the formula for calculating focal length in lens systems.
  • Explore the principles of collimation and its applications in optics.
  • Learn about the effects of lens diameter on focal point accuracy.
  • Study examples of optical system sketches to improve visualization skills.
USEFUL FOR

Optics students, engineers working with optical systems, and anyone involved in designing or analyzing collimators.

Barbossa
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TL;DR
I wanted to calculate the focal length and focal point of the collimator. The collimator diameter is 3mm and I wanted to focus on the 100-micrometre active area of the detector.
I wanted to calculate the focal length and focal point of the collimator. The collimator diameter is 3mm, and I wanted to focus on the 100-micrometre active area of the detector.
 
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Hello @Barbossa ,
:welcome: !​
That is very interesting. Do you have any input for your calculation ?

Is this homework or a school lab ?
##\ ##
 
Hi
Thanks!. Yeah! The detector active area is 180 µm and lens diameter is 3 mm.
 
Yes, you said that. Do you realize that isn't enough ? What about a sketch of the situation, and what it is that you want to do -- exactly.

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