Telescopes

November 10, 2019 - 65 files posted from Handbook of Optics
         Making models from the prescription in the Handbook was straightforward.  The prescriptions generally are scaled to an entrance pupil diameter of 200mm, and generally shown with only an axial field point.  For the sake of continuity, I generally built the models with the same field of view.   I suspect that this field of view is wrong for all reasonable applications.  I also ignored obscurations.

January 24, 2017 - Four files posted
    These files are mostly of unobscured all-reflective designs.  This class of designs is interesting because it generally takes full advantage of modern methods for making aspheric optics.  I've never worked with such systems, but the look like they'd be lightweight and compact.  Unfortunately, complex coordinate transformations are necessary to define the system clearly, complicating the task of building models from the patent disclosures.

August 15, 2018 - 17 Gabor variants posted
              David Shafer’s recent article in Optical Engineering   contains many schematics of what’s come be known as the Gabor design.  He cautions that many of these designs are not especially useful as they stand, because of needing a curved image and not having color correction.  Instead, they are generally meant to illustrate three points:
              1) Even simple designs can have multiple solution regions and those should be explored.
              2) Very high performance with very simple designs can be achieved if a curved image is allowed, and
              3) Good starting points for further complexity can be generating by a solid understanding of aberration theory and prior design history
Furthermore, I’d like to note that this set of models is further evidence that the prescriptions contained in patent literature can be misleading.  Gabor’s British patent (#544,694A) is not well corrected, and optimum performance places the stop far from the concentric position as described in Shafer’s paper.  The model is included here anyway;  it’s fun to re-optimize such classic designs, pretending to be a better designer than the people from long ago.
 
              I needed help to generate some of these models.  I was able to generate models that looked very much like the figures, but straightforward optimization drove the system to other solutions, with much worse performance that David describes in his paper.  David kindly helped me, though, sending several complete prescriptions.  More importantly, he helped with some insight.  Some of the designs balance large aberrations across surfaces; this balancing is likely to give local minima in merit functions.  Figure 6  ()  in the paper is an example of such a system.
 
              Let me close by noting what a tremendous resource David Shafer has been.  He’s helped a lot with generating of these models.  More importantly, he has a long history of instructive and thought-provoking publications, many of which are summarized on his slideshare (https://www.slideshare.net/operacrazy) account.  I’ve always enjoyed reading his work; after this exercise, I can attest that his papers all deserve detailed study, by building models or working through the aberration theory.


Listing of design files:


 Design basis
 program image size
(1/2 diag, mm)
 f/#
 efl
(mm)

 Notes
 Handbook ex. 2 Zemax 1.4 4 80 Mangin doublet
 Handbook ex. 3 Zemax 1.4 80 Cassegrain
 Handbook ex. 4 Zemax 1.4 4 80 Ritchey-Chretien
 Handbook ex. 5 Zemax 12 4 1400 Ritchey-Chretien  with corrector
 Handbook ex. 6 Zemax 0.14 4 80 Dall-Kirkham
 Handbook ex. 7 Zemax 1.4 4 80 Cassegrain with corrector & spherical primary
 Handbook ex. 8 Zemax .26 4 300 Cass, sphere primay, reflective corrector
 Handbook ex. 9 Zemax 0.2 deg  afocal Cassegrain-Mersenne
 Handbook ex. 10 Zemax 0.4 1.4 22.7 dual-magnification Cassegrain
 Handbook ex. 11 Zemax 7.5 3.2 844 three-lens prime focus corrector
 Handbook ex. 12 Zemax 0.28 4.0 80 Gregorian
 Handbook ex. 13 Zemax 0.7 4.0 80 aplanatic Gregorian
 Handbook ex. 14 Zemax  1.2 25 flat medial field aplanatic Gregorian
 Handbook ex. 15 Zemax 0 1.3 24 flat medial field aplanatic Gregorian
 Handbook ex. 16 Zemax 0.5 deg  afocal afocal Gregorian-Mersenne
 Handbook ex. 17 Zemax 0.5 1.25 27.4 Coude
 Handbook ex. 18 Zemax 0.5 1.25 27.4 Schwartzchild
 Handbook ex. 19 Zemax 0.81.25 24 aplanatic, astigmatic Schwarzchild
 Handbook ex. 20 Zemax 0.71.020  aplanatic, astigmatic Schwarzchild with corrector
 Handbook ex. 21 Zemax 1.7 1.25 25 anastigmatic, flat field Schwarzchild
 Handbook ex. 22 Zemax 1.4 1.25 26 Schmidt
 Handbook ex. 23 Zemax 1.28 1.25 25 schmidt with field flattener
 Handbook ex. 24 Zemax 0.91.25 25 Wright
 Handbook ex. 25 Zemax 184.0 68 reflective ßchmidt
 Handbook ex. 26 Zemax 0.751.0 12 solid Schmidt
 Handbook ex. 27 Zemax0.641.25 25 Schmidt Cassegrain
 Handbook ex. 28 Zemax 2.5 3.3 68 reflective ßchmidt
 Handbook ex. 29 Zemax 0.7 2.0 43 Shafer relayed virtual schidt
 Handbook ex. 30 Zemax 0.75 2.2 50 spherical primary with Schmidt principle
 Handbook ex. 31 Zemax 13 2.0 40 Maskutov
 Handbook ex. 32 Zemax 1.7 1.25 24 olid Maksutov-Cassegrain
 Handbook ex. 33 Zemax 1.9 1.5 1.5 wide ring field
 Handbook ex. 34 Zemax 0.27 1.0 20 Gabor
 Handbook ex. 35 Zemax 1.4 4.0 80 Schmidt mesiscus Cassegrain
 Handbook ex. 36 Zemax 8.25 1.2 34 Baker super-Schmidt
 Handbook ex. 37 Zemax3.5  1.0 20 Baker-Nunn
 Handbook ex. 38 Zemax 3.5 10 200 Houghton-Cassegrain
 Handbook ex. 39 Zemax 1.25 3.6 72 Houghton-Cassegrain
 Handbook ex. 40 Zemax 0.88 1.25 25 Shenker
 Handbook ex. 41 Zemax 0.9 1.25 3 Mangin-Cassegrain with correctors
 Handbook ex. 42 Zemax 0.9 1.25 25 Mangin-Cassegrain with correctors
 Handbook ex. 43 Zemax 1.4 4.0 80 Eisenberg-Pearson twomirror three reflection
 Handbook ex. 44 Zemax 1.4 4.0 80 Shafer two-mirror three reflection
 Handbook ex. 45 Zemax 5.8 15 300 decentered two mirror three reflection
 Handbook ex. 46 Zemax 5.0 15 300 Yolo
 Handbook ex. 47 Zemax    Schiefspiegler
 Handbook ex. 48 Zemax 6.0 8.0 160 Catadioptric Herschellian
 Handbook ex. 49 Zemax  4.0 82 SEAL
 Handbook ex. 50 Zemax 0.7 4.0 80 Paul 3-mirror
 Handbook ex. 51 Zemax 0.7 4.0 80 Paul 3-mirror
 Handbook ex. 52 Zemax 3.0 4.0 77 off-axis eccentric pupil Paul-Gregorian
 Handbook ex. 53 Zemax 2.6 4.0 80 Three-mirror Cassegrain
 Handbook ex. 54 Zemax 1 deg epd = 22 afocal 3-mirror afocal
 Handbook ex. 55 Zemax 1 deg epd = 20 afocal 3-mirror afocal
 Handbook ex. 56 Zemax 0.7 4.0 80 Three-mirror Cassegrain
 Handbook ex. 57 Zemax 2.8 5.5 133 spherical primary three mirror
 Handbook ex. 58 Zemax 1.7 4.0 81 spherical primary three mirror
 Handbook ex. 59 Zemax 7.0 4.0 80 three mirror Korsch
 Handbook ex. 60 Zemax 14 4.0 80 three miror Cook
 Handbook ex. 61 Zemax 18 4.0 80 Three mirror Wetherell
 Handbook ex. 62 Zemax 0.7 10 200 Korsch three mirror four reflection
 Handbook ex. 63 Zemax 2.2 1.2 26 McCarthy
 Handbook ex. 64 Zemax 0.4 2.0 44 Cassegrin objective with Schwarzchild relay
 Handbook ex. 65 Zemax 0 4.0 80 Altenhof
 Handbook ex. 66 Zemax 14 4.5 90 Shafer four mirror unobscured
 Handbook ex. 67 Zemax 4.8 4.5 90 Shafer flat mirror unobscured
      
US08011793 Zemax2003.5500 unobscured
US08184368 Zemax 7 4.4 200 unobscured
US08194318 Zemax 15 6.4 420refractive
US04733955 Zemax 12 4 40 unobscured
 GB544694A Zemax   1 Original Gabor patent
 Shafer-Gabor - fig 1 Zemax   100 
 Shafer-Gabor - fig 2 Zemax   100 
 Shafer-Gabor - fig 3 Zemax   100 
 Shafer-Gabor - fig 4 Zemax   100 
 Shafer-Gabor - fig 5 Zemax   100 
 Shafer-Gabor - fig 6 Zemax   100 
 Shafer-Gabor - fig 7 Zemax   100 
 Shafer-Gabor - fig 8 Zemax   100 
 Shafer-Gabor - fig 9 Zemax   100 
 Shafer-Gabor - fig 10 Zemax   100 
 Shafer-Gabor - fig 11 Zemax   100 
 Shafer-Gabor - fig 12 Zemax   100 
 Shafer-Gabor - fig 14 Zemax   100 
 Shafer-Gabor - fig 17 Zemax   100 
 Shafer-Gabor - fig 18 Zemax   100 

SelectionFile type iconFile nameDescriptionSizeRevisionTimeUser
Ć

Download
  32k v. 1 Aug 15, 2018, 12:47 PM Dan Reiley
Ć

Download
  35k v. 1 Aug 15, 2018, 12:47 PM Dan Reiley
Ć

Download
  61k v. 1 Aug 15, 2018, 12:47 PM Dan Reiley
Ć

Download
  51k v. 1 Aug 15, 2018, 12:47 PM Dan Reiley
Ć

Download
  19k v. 1 Aug 15, 2018, 12:47 PM Dan Reiley
Ć

Download
  72k v. 1 Aug 15, 2018, 12:47 PM Dan Reiley
Ć

Download
  20k v. 1 Aug 15, 2018, 12:48 PM Dan Reiley
Ć

Download
  6k v. 1 Aug 15, 2018, 12:48 PM Dan Reiley
Ć

Download
  23k v. 1 Aug 15, 2018, 12:48 PM Dan Reiley
Ć

Download
  12k v. 1 Aug 15, 2018, 12:48 PM Dan Reiley
Ć

Download
  9k v. 1 Aug 15, 2018, 12:48 PM Dan Reiley
Ć

Download
  11k v. 1 Aug 15, 2018, 12:47 PM Dan Reiley
Ć

Download
  35k v. 1 Aug 15, 2018, 12:47 PM Dan Reiley
Ć

Download
  20k v. 1 Aug 15, 2018, 12:47 PM Dan Reiley
Ć

Download
  25k v. 1 Aug 15, 2018, 12:47 PM Dan Reiley
Ć

Download
  18k v. 1 Aug 15, 2018, 12:48 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  5k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  5k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  8k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  5k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  8k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  5k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  11k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  8k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  5k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  5k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  5k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  6k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  6k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  5k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  6k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  6k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  6k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  6k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  6k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  8k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  10k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  8k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  8k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  10k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  10k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  8k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  8k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  10k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  9k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  10k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  11k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  12k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  11k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  9k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  10k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  13k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  9k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  6k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  6k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  6k v. 1 Nov 10, 2019, 12:57 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  8k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  7k v. 1 Nov 10, 2019, 12:56 PM Dan Reiley
Ć

Download
  10k v. 1 Nov 10, 2019, 12:55 PM Dan Reiley
Ć

Download
  14k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  18k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  17k v. 1 Nov 10, 2019, 12:54 PM Dan Reiley
Ć

Download
  7k v. 1 Jan 24, 2017, 3:04 PM Dan Reiley
Ć

Download
  58k v. 1 Jan 24, 2017, 3:02 PM Dan Reiley
Ć

Download
  134k v. 1 Jan 24, 2017, 3:03 PM Dan Reiley
Ć

Download
  22k v. 1 Jan 24, 2017, 3:03 PM Dan Reiley