optical design with mirrors jose sasian · "the world of unobstructed reflecting...

Prof. Jose Sasian Short Course

Optical Design with Mirrors with emphasis in unobstructed

systems

Jose Sasian

Contents

• Introduction• References and papers • On-axis systems• Un-obstructed systems• Examples• Summary

Introduction

• Why this short-course?• Course requirements• How I got experience with mirrors• What you should expect from the course• Mostly aberration control• References

References• Dietrich Korsh, Reflective Optics, Academic Press, 1991.• H. P. Bruegemann, Conic Mirrors, Focal Press 1968.• Reflective and Catadioptric objectives, Lloyd Jones,

Chapter 18, Handbook of Optics, OSA.• Michael Rogers, Un-obscured Mirror Designs, SPIE

4832 Proceedings IODC 2002.• Patent literature• Journal and Proceedings papers

Papers• Sasian, J. M., "Flat-field, anastigmatic, four-mirror optical system for large

telescopes," Opt. Eng. 26 (12), 1197-1199 (1987)• Sasian, J. M., "Four-mirror optical system for large telescopes," Opt. Eng. 29 (10),

1181-1185 (1990).• Sasian, J. M., "Design of a Schwarzschild flat-field, anastigmatic, unobstructed, wide-

field telescope," Opt. Eng. 29 (1), 1-5 (1990).• J. M. Sasian, ‘Annular surfaces in annular field systems,’ Optical Engineering, 36(12),

3401-3403, 1997.• Sasian, J. M. "Review of methods for the design of unsymmetrical optics," SPIE

Proceedings on Optical Engineering Midwest'90 1396, 453-466 (1991).• Sasian, J. M., "How to approach the design of a bilateral symmetrical optical system,"

Opt. Eng. June (1994) • Sasian, J. M., "The world of unobstructed reflecting telescopes," Journal of the

Amateur Telescope Makers 1, Fall 1992. Also in “The best of the amateur telescope making journal, “ William Cook Editor, Willmann-Bell, 2003.

• J. M. Sasian, ‘Double-curvature Surfaces in Mirror System Design.’ Optical Engineering, 36(1), 183-188, (1997)

Mirror virtues/problems

• Large and small apertures• Large bandwidth• No intrinsic chromatic aberations• Support system• Aspheric surfaces• Twice the deflection and no cancellation• Stronger scattering

Wave aberration conceptsreview

...cos

coscos

222222

HWHWHW

HWWHWHW

mlkmlk HWHW

,,,, cos,

Wave aberration

Design of reflective axially symmetric systems

Flat-field, anastigmatic, four-mirroroptical system for large telescopes

Design of un-obstructed reflective systems

Symmetry

• Axially symmetry• Double plane symmetry• Plane symmetry• Monocentric symmetry• Confocal symmetry• Non identiafiable symmetry

Methods of design for NRS

• Eccentric and off-axis sections• Annular or Ring field systems• Concatenation of well corrected

systems• Tilted component theory• Expansion about the Optical Axis Ray• Confocal systems

Eccentric and off-axis systems

Annular or Ring field systems

Perkin-Elmer’sMicralignconcept byA. Offner 1975

Ring-field system for EUV lithography Annular surfaces

Concatenation of systems Example: on axis aspheric

system

Dietrich Korsh

Concatenation of systems Example: Reed and Schwarzschild systems by David Shafer

Tilted component system

Tilted Component Optical Systems, Richard Buchroeder, Ph. D. Dissertation, University of Arizona

Scheimpflug condition

Displacement of the aberration field center

Aberration fields

K. Thompson, "Description of the third-order optical aberrations of near-circular pupil optical systems without symmetry," J. Opt. Soc. Am. A 22, 1389-1401 (2005)

Plane symmetric systems:Expansion about the OAR

Plane symmetric aberration function

Aberrations of aPlane symmetric system

Aberration coefficients

Aberration coefficient calculation

Basic forms of astigmatism

Behavior of coma

Confocal arrangement of mirrors:No aberration along the optical axis ray.

Excellent starting design point

Use paraboloids, ellipsoids, hyperboloids

Examples

Optical surfaces ....

)11110864

DhChBhAhhck

Amateur telescopes I

Amateur telescopes II

Double curvature mirrors I

ToroidEllipsoidElliptical paraboloid

Double curvature mirrors II

Double curvature mirrors III

A 1.6 m off-axis paraboloid

R=13 mD=1.6 mE=2.4 m

Confocal system: Cassegrain telescope made unobstructed

Summary

• Comments on several references• Basic review of aberrations• Methods to design un-symmetrical

systems• Examples• Must have a good idea about how the

basics for designing some reflective systems

optical design with mirrors jose sasian · "the world of unobstructed reflecting...

Documents

unobstructed minds: macbook air plus!

national amateur

amateur fishing

an unobstructed view of history: perryville battlefield

amateur photographer

landscape assessment of amateur radio activities · 1.2...

amateur circus

warehouse safety checklist · 2017-09-11 · 2 general...

amateur operato advanced - australian maritime college ·...

diffractive optical elements - university of arizona · pdf...

amateur #05

radio amateur civil emergency service amateur radio

mga junior amateur mga junior amateur history 1984-2019

amateur baseball

18 stories unobstructed views 2nd floor balcony

introduction to aberrations...ihh u w hh2' Ж alternatively...

amateur magazine

amateur catalog

the unobstructed universe (1940) by stewart edward white

amateur apps