Stray Light

Stray Light
This course will study the Stray Light in a Maksutov telescope. It will demonstrate some useful tools like filter strings, ray files and path analysis.
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About This Course

This course includes the following content: 

  • Converting Sequential Systems to Non Sequential
    • Convert a sequential design of a Maksutov Telescope
  • Introduction to Stray Light Analysis
    • Reminder of the different steps of a Stray Light Analysis
  • Stray Light Example Maksutov Telescope
    • Correction of the conversion to non sequential
    • Add the mechanical design
    • Add scattering properties
    • Check straylight on the optical design
  • Tools for Stray Light Analysis
    • Introduction to filter strings, ray files (ZRD), path analysis
    • Study direct path on the Maksutov telescope
    • Study of Critical surfaces and Illuminated objects on the Maksutov telescope
  • Non Sequential Ghost Analysis
    • Example on a Cooke Triplet

Curriculum

  • Before we get started....
Stray light Analysis
  • 1. How to run a StrayLight Analysis?
  • 2. Stray light requirements
Ghost Analysis
  • 3. What is a Ghost Analysis?
  • 4. Sequential Mode: Running Ghost Analysis
  • 5. Sequential Mode: Eliminate Ghost
  • 6. Non-Sequential Mode: Ghost Analysis
  • Quiz on Ghost Analysis
Importing the Design to Non-Sequential
  • 7. Maksutov Telescope
  • 8. Explanation of the sequential file
  • 9. Convert to Non-Sequential Mode
  • 10. Conversion of the Maksutov Telescope
  • 11. Correction of the conversion
  • 12. Checking the conversion
Build Stray Light Model
  • 13. Mechanical Design
  • 14. Adding Mechanical Design
  • 15. Add Off-Axis Source
  • 16. Adjust Non-Sequential Ray-Trace Settings
  • 17. Apply Surface Properties (Coating, Scattering)
  • 18. Building the Model (Steps 15, 16 and 17)
Computing Stray light performance
  • 19. PST
  • 20. Detector FOV
Stray light tools
  • 21. Filters
  • 22. Ray Database (ZRD) Files
  • 23. Path Analysis
Evaluate Paths and Baffle Design
  • 24. Optical Design Verification
  • 25. Direct Path
  • 26. Add baffle and vane to eliminate direct path
  • 27. Identify Paths
  • 28. Critical Surfaces and Illuminated Objects
  • 29. Object As a Detector
  • 30. Path Analysis
  • Quiz on "Evaluate Paths and Baffle Design"
Test your knowledge!
  • Stray light Analysis - Test your knowledge!