1. Optomechanics Lab Presentation OPTI 521L, Fall 2015 Daniel Millstone Kerry Nierenberg

2. Recall Lab 2 Alignment telescope – 4F system Defined an optical axis Found optical C of Cs Ended up with properly aligned lens(es)

3. Recall Lab 3 Air-bearing as datum PSM as reference beam Find optical axis Co-align lens to datum Use different degrees of freedom for different optical surfaces

4. Goal Create a system that can replicate the behavior of a lens alignment station, alignment telescope, and autocollimator Minimize cost Reduce size of instrument Use off the shelf parts Initial design to prove function

5. Alternative Design Cage plates Source (Fiber-Coupled) Shear Plate & Mirror Afocal Relay(s) Beamsplitter CCD

6. How it Works - Flat Surface

7. Why This Design? Affordable Pre-constrained design Compact Integrated Highly Adjustable (Afocal Relay) Multi-functional – Alignment Telescope – PSM – Autocollimator

8. Cost Analysis - Breakdown ITEMPART NUMBERCOSTQUANTITYTOTAL 1'' Kinematic MountKM100$38.703$116.10 1/2'' Translating Post Holder PH2T$55.602$111.20 1/2'' Optical PostTR2$5.193$15.57 1/2'' Translation StageMT1$286.004$1,144.00 CCD CameraPoint Grey Flea3$249.001 AutocollimatorDavidson$1,700.001 PSM- - -$2,500.001 Air Bearing System- - -Thousands1 PRECISION METHOD

9. Cost Analysis - Breakdown ITEMPART NUMBERCOSTQUANTITYTOTAL 1'' Cage MountCP02$16.0010$160.00 8'' Cage Assembly RodSR8$12.4012$148.80 BeamsplitterCM1-BP1$231.001 Lens TubeSM05M30$18.001 1/2“ Optical PostTR2$5.194$20.76 CCD CameraPoint Grey Flea3$249.001 Round Silver MirrorPF10-03-P01$50.001 Shear PlateSI500P$369.001 LensesLA1608$21.204$84.80 CAGE PLATE METHOD

10. Total Cost Precision Method > $10,000.00 Cage Plate Method ~ $1331.36

11. Pre-Constrained Design Limited degrees of freedom (cage plates) Only allows for desirable motion 4-cone mount for repeatable and kinematically controlled system rotation

12. Compact / Integrated If space were an issue…what would you rather work with? Linear Stage / Air Bearing – At LEAST 2m tall OR Our System – Portable (Easily Handled) – 0.5m long

13. Highly Adjustable Variable relay system Cage plates allow: – Movement of lenses – Switching lenses out easily Source easily changed

14. Multiple Functions Alignment Telescope PSM Autocollimator

15. Demo

16. Issues with the Design HIGHLY aberrated Over constrained Manually adjusted for focus Long lever arm could induce tilt/decent of lenses Precision of system is based on the manufacturing tolerances of cage plate and lens tube Issues with “point contact” for rotation

17. Concave Surface

18. Convex Surface

19. Flat Surface

20. Concave Surface – Aspheric System

21. Convex Surface – Aspheric System

22. Flat Surface – Aspheric System

23. Conclusion Functional System Less expensive Not as high precision Definitely room for improvement

24. References Oh, Chang, and Jim Burge. Introduction to Optomechanical Engineering Lab. Lectures 2, 3. Special thanks to: Matt Dubin, Laura Coyle for their previous work on similar topics Dr. Oh and Chase Salsbury for their help this semester

25. END