How to make a telescope?

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Product code: HowToMake

How to make a telescope?

More about the product

The first edition of How to Make a Telescope was universally acclaimed as the best book ever written for making a Newtonian telescope. This 2nd Edition is almost three times larger and adds to the original text new chapters on making a Cassegrainian telescope, optical windows, and equatorial mounts. Chapters on eyepieces and astronomical seeing have been expanded. Computer programs written in generic BASIC for reduction of Foucault test data. Included are indexes for the three principle magazines that carry telescope making information: Sky and Telescope\'s \"Gleanings for ATM\'s\" from November 1941 through June 1998, Scientific American magazine from 1925 through 1959 and the complete run of  Telescope Making magazine.  This book is the most complete single work available on making reflecting telescopes.
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Table of Contents

1. Basic Properties and a Proposed Telescope
    1.1. \"Geometrical Objects\" and the Astronomical Telescope
    1.2. A Bit of Physical Optics
    1.3. Definition of a Perfect Objective
    1.4. The Rayleigh Criterion
    1.5. Principal Types of Telescopes
    1.6. Refractor vs. Reflector as the Amateurs Telescope
    1.7. Practical Conclusion: The \"Standard\" Telescope
2. Making the Main Mirror
    2.1. Form of the Main Mirror in the Newtonian Telescope
    2.2. Working of Optical Surfaces and Theories Concerning Polishing
    2.3. The Mirror Blank and Tool
    2.4. Abrasives
    2.5. Polishing Materials
    2.6. Summary of Grinding and Polishing Needs
    2.7. Work Support and Accessories
    2.8. Preparing the Mirror Disk
    2.9. Rough Grinding
    2.10. Testing Radius of Curvature
    2.11. Finishing Rough Grinding
    2.12. Fine Grinding and Smoothing
    2.13. Characteristics of the Smoothed Optical Surface
    2.14. Pitfalls in the Smoothing Operation
    2.15. The Polishing Lap
    2.16. Making the Lap
    2.17. Polishing Conditions and Requirements
    2.18. The Polishing Operation
    2.19. Completion of Polishing
    2.20. Surface, Wavefront, and Image Errors
    2.21. Review of Possible Test Methods
    2.22. Nature of the Foucault Test
    2.23. Foucault Test Apparatus
    2.24. Making the Foucault Test
    2.25. Diffraction Effects in the Foucault Test
    2.26. Sensitivity of the Foucault Test
    2.27. Principle of Parabolic Mirror Testing
    2.28. Definitions Relating to Spherical Aberration
    2.29. Effects of Spherical Aberration
    2.30. Measurement of Spherical Aberration
    2.31. The Couder Screen
    2.32. Screen Test Procedure; Errors
    2.33. Defects Other Than Figures of Revolution
    2.34. Primary and Micro-Ripple
    2.35. Zonal Defects
    2.36. Local Retouching
    2.37. Parabolizing
    2.38. Retouching the Defective Parabola
    2.39. Reducing Aberrations to the Focal Plane
    2.40. Test Data Sheet
    2.41. Interpreting the Test Data
3. The Plane Diagonal Mirror
    3.1. Mirror vs. Prism-Comparative Requirements
    3.2. Form and Dimensions of the Diagonal Mirror
    3.3. Interference Test for Flat Mirrors
    3.4. Making the Interference Test
    3.5. Testing by Combination with a Spherical Mirror
    3.6. The Diagonal Mirror Blank
    3.7. Resurfacing a Flat Mirror
    3.8. Cutting the Mirror
4. Mechanical Structure
    4.1. Choice of a Standard Design
    4.2. Important Details
5. The Altazimuth Mounting
    5.1. Principles of Design
    5.2. Details of Importance or Interest
6. Making a Cassegrainian Telescope
    6.1. The Classic Cassegrainian: Configuration and Notation
    6.2. Advantages and Disadvantages of the Classic Cassegrainian
    6.3. The Coudé or Nasmith Modifications
    6.4. Selection of Design Constants
    6.5. Calculating Related Design Constants
    6.6. Deformation Coefficients and Off-Axis Aberrations
    6.7. Judging the Difficulty of Figuring
    6.8. Design Examples for Two Cassegrainian Telescopes
7. Making the Primary Cassegrainian Mirror
    7.1. Rough Check for Strain
    7.2. Cutting the Hole
    7.3. Finishing the Perforated Mirror
    7.4. The Apertured Couder Screen
    7.5. Parabolizing Mirrors of Large Relative Aperture
8. Making the Secondary Cassegrainian Mirror
    8.1. Testing Combined Mirrors on a Star
    8.2. Testing the Combined Mirror with a Plane Mirror
    8.3. Method of Hindle
    8.4. Testing the Secondary Against a Concave Reference
    8.5. General Purpose for Small Mirrors
    8.6. Edging
    8.7. Rough Grinding
    8.8. Spherometry
    8.9. Smoothing
    8.10. Polishing and Retouching
9. Mechanical Design of the Cassegrainian
    9.1. Adaptation of the Standards Telescope Tube
    9.2. Cylindrical Tubes 180
    9.3. Construction of a 257 MM Cassegrainian
10. The Telescope Window
    10.1. Advantages of a Telescope Window
    10.2. Choice of a Glass
    10.3. Cutting the Central Hole and Edging
    10.4. Smoothing Tolerances and Parallelism
    10.5. Rough Grinding, Fine Grinding and Smoothing
    10.6. Optical Testing of the Window
    10.7. Polishing and Retouching
    10.8. Quantitative Testing and Data Reduction
11. The Eyepiece
    11.1. Role of the Eyepiece and its Selection
    11.2. Principal Types of Eyepieces
    11.3. The Barlow Lens
    11.4. Standard Series of Plössl Eyepieces
12. The Equatorial Mounting
    12.1. General Discussion
    12.2. Principle Types of Equatorial Mountings
    12.3. Designs to be Avoided
    12.4. Practical Advice for Construction of a Cradle Mounting
    12.5. Practical Advice on Offset Cradle Mountings
    12.6. Practical Advice on Simple English Mountings
    12.7. Practical Advice on German Mountings
    12.8. Practical Advice on Fork Mountings
    12.9. Practical Advice on Mountings with a Table Atop the Polar Axis or Inverted Fork
    12.10. Generalizations Concerning Clock Drives
    12.11. Drive Using a Screw and Smooth Sector
    12.12. Classic Drive Using a Worm and Wheel Combination
13. Accessories, Mirror Coating, Paint and Metal Part Finishing
    13.1. Finders
    13.2. Photographic Plate Holder and Lateral Eyepiece
    13.3. Paints and Metal Part Treatment
    13.4. Reflective Mirror Coatings
    13.5. Chemical Silvering
    13.6. Aluminizing
    13.7. Shipping of the Mirror for Aluminizing
    13.8. Care of Aluminized Mirror
14. Adjustments of Mirrors and Mountings
    14.1. Aligning the Mirrors
    14.2. Aligning the Cassegrainian
    14.3. Balancing the Equatorial
    14.4. Siting of the Equatorial Telescope
15. Atmospheric Turbulence
    15.1. Difficulties in the Use of a Medium Power Telescope
    15.2. Atmospheric Defects
    15.3. Star Image Changes in the Small Instrument
    15.4. Star Image Changes in a Large Instrument
    15.5. Image Changes Due to Photographic Diffusion
    15.6. First Stage of Turbulence: The Instrument
    15.7. Second Stage: Local Turbulence
    15.8. Third Stage: High Altitude Turbulence
    15.9. Conclusion

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