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Spie Press Book

Mounting Lenses in Optical Instruments
Author(s): Paul R. Yoder Jr.
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Book Description

This Tutorial Text is intended for practitioners in the fields of optical engineering and optomechanical design. It provides a comprehensive examination of the different ways in which lenses typically are mounted in optical instruments, of the advantages and disadvantages of various mounting arrangements, and of the analytical tools that can be used to evaluate and compare different designs. Each section contains an illustrated discussion of the technology involved and one or more practical examples, where feasible.

Book Details

Date Published: 1 October 1995
Pages: 194
ISBN: 9780819419415
Volume: TT21

Table of Contents
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1. Introduction
1.1 Environmental considerations
1.2 Materials properties
2. Attributes of the Successful Lens-to-Mount Interface
2.1 Mechanical constraints
2.2 Consequences of mounting forces
2.3 Sealing the lens to the mount
2.4 Cost and manufacturability
3. Individual Component Mounting Techniques
3.1 Spring mountings
3.2 Burnished cell mountings
3.3 Ring constraints
3.4 Retaining ring constraints
3.4.1 Threaded retaining ring
3.4.2 Clamping (flange) ring
3.4.3 Distributing preload uniformly
3.4.4 Sealing techniques
3.5 Sharp-comer interfaces
3.6 Tangential interfaces
3.7 Toroidal interfaces
3.8 Spherical interfaces
3.9 Interfaces on bevels
3.10 Elastomeric mountings
3.11 Advantages of a spherical lens rim
3.12 Optics with nonsymmetric apertures
3.13 Mounting plastic components
4. Multiple-Component Assemblies
4.1 Spacer design- and manufacture
4.2 Drop-in assembly
4.33 Lathe assembly
4.4 Poker-chip assembly
4.5 Modular assembly
4.6 Sealing and purging considerations
4.7 Internal mechanisms
4.8 Catadioptric systems
4.9 Temperature compensation
5. Estimation of Axial Stress in Lenses
5.1 Stress due to preload
5.2 Effect of changing interface type
5.2.1 General
5.2.2 Sharp-comer interfaces
5.2.3 Tangential interfaces
5.2.4 Toroidal interfaces
5.2.5 Spherical interfaces
5.2.6 Flat bevel interfaces
5.2.7 Parametric comparisons of interface types
5.3 Effect of changing preload
5.4 Effect of changing surface radius
5.5 Effect of changing temperature
5.5.1 Change in preload
5.5.2 Change in axial clearance at increased temperature
5.5.3 Providing residual preload at maximum temperature
5.5.4 Stress at low temperature
5.6 Effect of changing material types
5.7 Stresses in multiple-component assemblies
5.7.1 Cemented doublets
5.7.2 Air-spaced doublets
5.7.3 General formulation for multiple components
5.8 Estimation of bending stress in tenses
5.8.1 Causes of bending
5.8.2 Bending stresses in the tens
6. Estimation of Radial Stress in Lenses
6.1 Radial stress in the lens
6.1.1 Radial stress in single components
6.2.2 Tangential (hoop) stress in the mount wall
6.2 Radial stress in multiple components
6.3 Radial force resulting from axial preload
6.4 Growth of radial clearance at increased temperature
7. Descriptions of Hardware Examples
7.1 Lens assembly designed to resist thermal shock
7.2 Infrared sensor lens assembly
7.3 Cemented doublet binocular objective assembly
7.4 Modular binocular objective assembly
7.5 Air-spaced triplet telescope objective assembly
7.6 Large-aperture objective lens subassembly
7.7 Microscope objective assembly
7.8 A simple focusing eyepiece assembly
7.9 Submarine periscope relay lens assembly
7.10 Lathe-assembled aerial camera lens assembly
7.11 Elastomeric-supported lens assembly
7.12 Projection lens assembly
7.13 Astrographic telescope objective assembly
7.14 Solid catadioptric lens assembly
7.15 Catadioptric star-mapping objective assembly
7.16 Long-focal-length catadioptric objective assembly
7.17 5:1 zoom lens assembly for 35-mm cine photography
7.18 Passively stabilized 10:1 zoom lens assembly
Appendix A. Pertinent Unit Conversion Factors
Appendix B. Selected Mechanical Properties of Materials
Appendix C. Derivation of an Equation for Temperature Sensitivity Factor K3 for a Single Lens Element
Appendix D. Derivation of an Equation for Temperature Sensitivity Factor K3 for a Cemented Doublet Lens
Index |

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