Eyepieces

January 24, 2017 - Six eyepiece design files posted today.
      Just catching up with some files I missed earlier. 

April 25, 201545 eyepiece design files posted today.
      These files, up until patent #8,531,774, represent a more-modern sampling of eyepiece designs.  The newer designs include a lot of design features, such as aspheres and high-index glasses, that weren't radily available at the time of the designs from Cox.  The newer designs also include many applications, such as virtual reality, that weren't anticipated at the time of the older designs.
    When compared to new designs that probably have similar design constraints, the old designs hold up surprisingly well.  For example, compare US02549158-4, a 1947 design by the Ludwig Bertele, to US05877900-1, a 1997 Nikon design.  Both designs have efl=25mm and are about f/3 and have an eye relief of about 18mm.  The Bertele design places the reticle very close to the last glass element, whereas the Nikon design allows for 8mm separation.  The Berele design uses six pieces of glass; the Nikon design, five.  The Bertele design is also 23% longer than the Nikon design.  I haven't done a tolerance analysis, but the Nikon design looks more stressed to me, with large angles of incidence on the negative surface of the doublet.  The Bertele design makes little use of high index glasses; five of the six glasses have n<1.6, and only one has n>1.7.  The Nikon design makes heave use of high index glasses; one of five glasses has n<1.6, and all others have n>1.7.  Despite this disadvantage in materials, the Bertele design performs relatively well.  Comparing RMS spot size vs/ field of view at EDP=8, max field =27deg, shows essentially equivalent axial performance.  Full field performance for the Bertele design is meaningfully worse; 129um RMS vs. 107um RMS for the Nikon design.
    Another design of note is 4720183, by Don Dilworth.  Don has been selling an excellent lens design code, Synopsys, for many years; although I've never met him, he seems like a treasure for our community.  He hasn't patented many of his designs, but this eyepiece seems like something special.  It has a +-45 deg FOV and is meant to correct the coma from parabaloid mirrors.  Looking through a telescope with this eyepiece must be something special.

November 19, 2014
- 67 design examples from Cox posted

     
67 files, in Oslo and Zemax format are uploaded.  The files are based on Cox’s “A system of optical design,” Type 2.  The designs are quite dated, from 1957 and older; but they can be quite useful as starting points for new designs or benchmarks for design comparisons.  More analysis of the Cox-based design files can be found on the Photographic primes page.

Listing of design files:


 Design basis Program Image size (1/2 diag, mm) f/# efl notes
US09229215-1 Zemax 8.7 2.5 10 
US07177087-1 Zemax 5 2.4 48 
US06809875-1 Zemax 2.6 3.4 13 
US06735018-1 Zemax 7.1 3.6 12 
US06735018-7 Zemax 8 5 16 
US05751495-1 Zemax 5.4 3.8 10 
 US08531774-1 Zemax63.1725
US08503089-1Zemax10.8 2 12.5 +- 50 deg FOV, virtual object
 US08345139-1 Zemax 6 1.2 26 22mm EPD
 US07978417-1 Zemax 3.5 3.2 25 
 US07969658-1 Zemax 3.5 3.2 25 
 US07924507-1 Zemax 23.5 4.3 67 
 US07509046-1 Zemax -11 5-31  for SLR viewfinder.  includes re-imaging
 US06962447-1 Zemax 11 6.2 50 
 US06692163-1 Zemax 11 6.2 50 
 US06529335-1 Zemax 7.1 4 14 embossed asphere
 US06476983-1 Zemax 7.1 3.6 12 virtual object
 US06166861-1 Zemax 11 20 
 US06104543-1 Zemax 4.8 3.2 10 virtual object
 US06104542-1 Zemax 12 5.5 25 
 US06094310-1 Zemax    afocal, +-40 deg FOV, for binoculars
 US06069750-1 Zemax 11 4.7 20 
 US06011655-1 Zemax 6 5 15 
 US06008949-1 Zemax 11 5 25 
 US05986816-1 Zemax9 3.6 21 
 US05973847-1 Zemax 11 5 25 
 US05877900-1 Zemax 11 3.1 25 
 US05815317-1 Zemax 12 4.1 25 
 US05812324-1 Zemax 7.5 3.615 virtual object
 US05774270-1 Zemax 11 5.6 17 
 US05757553-1 Zemax 11 5 17 virtual object
 US05748380-1 Zemax 6.6 3.5 10 virtual object
 US05726808-1 Zemax 9.3 5.5 18
 US05691850-1 Zemax 8.6 3.3 16
 US05684635-1 Zemax 11 516 +-40 deg, virtual object
 US05663834-1 Zemax 5.5 4.5 7-22 zoom
 US05659422-1 Zemax 5 3.5 10 
 US05638213-1 Zemax 9.4 4.8 12 virtual object
 US05612823-1 Zemax 5 5 10 virtual object
 US05587837-1 Zemax 11 4.6 37 foro binoculars, long eye relief
 US05579167-1 Zemax 14 6.225  virtual object
 US05568319-1 Zemax 5.6 3 12 
 US05557464-1 Zemax    'afocal, +-40 deg FOV, for binoculars
 US05546237-1 Zemax 11 6 20 
 US05255121-1 Zemax 13 4 25 virtual object
 US05227918-1 Zemax 0.377 6 1 
 US05162945-1 Zemax 0.488 4 1 
 US05059004-1 Zemax 1.4 2.2 7.3 
 US04747675-2 Zemax 6 4 10 virtual object
 US04720183-1 Zemax 13 5.2 15 
 US04497546-1 Zemax 13 7.5 25 virtual object
 US04099842-1 Zemax 63 3.8 100 
US02900871-1
 Oslo 0.04
2.78
1
 EYEPIECE , cox 2-39 US2900871
US02637245-5  Oslo 0.04 2.50 1   eyepiece , cox 2-37 US2637245,EX.5
US02637245-4  Oslo 0.03 2.50 1   eyepiece , cox 2-36 US2637245,EX.4
US02637245-3  Zemax 5.3 1.7 25   eyepiece, Cox example 2-35
US02637245-3  Oslo 0.02 1.67 1   eyepiece , cox 2-35 US2637245,EX.3
US02637245-2  Oslo 0.03 2.50 1   eyepiece , cox 2-34 US2637245,EX.2
US02637245-1  Zemax 8.1 1.8 25   eyepiece, Cox example 2-31
US02637245-1  Oslo 0.04 1.79 1   eyepiece , cox 2-33 US2637245,EX.1
US02621564-3  Oslo 0.04 2.50 1   eyepiece , cox 2-32
US02621564-2  Zemax 10.1 2.5 25   eyepiece, Cox example 2-31
US02621564-2  Oslo 0.04 2.50 1   eyepiece , cox 2-31
US02621564-1  Zemax 10.1 2.5 25   eyepiece, Cox example 2-30
US02621564-1  Oslo 0.04 2.50 1   eyepiece , cox 2-30 US2621564,EX.1
US02549158-4  Zemax 10.1 3.3 25   eyepiece, Cox example 2-29
US02549158-4  Oslo 0.04 3.33 1   eyepiece , cox 2-29
US02549158-3  Zemax 10.1 2.6 25   eyepiece, Cox example 2-28
US02549158-3  Oslo 0.05 2.50 1   eyepiece , cox 2-28 US2549158,FIG.3
US02549158-2  Zemax 10.1 4.2 25   eyepiece, Cox example 2-27
US02549158-2  Oslo 0.04 3.33 1   eyepiece , cox 2-27
US02549158-1  Zemax 10.1 4.2 25   eyepiece, Cox example 2-26
US02549158-1  Oslo 0.03 4.17 1   eyepiece , cox 2-26
US02528468-3  Oslo 0.06 2.27 1   eyepiece , cox 2-25
US02528468-2  Oslo 0.04 2.27 1   eyepiece , cox 2-24
US02528468-1  Zemax 11.1 2.8 25   eyepiece, Cox example 2-23
US02528468-1  Oslo 0.06 2.50 1   eyepiece , cox 2-23 US2528468,EX.1
US02267832-2  Zemax 9.6 4.5 25   eyepiece, Cox example 2-19
US02267832-2  Oslo 0.04 1.67 1   eyepiece , cox 2-19 US2267832,FIG.2
US02267832-1  Zemax 9.6 3.0 25   eyepiece, Cox example 2-18
US02267832-1  Oslo 0.04 1.43 1   eyepiece , cox 2-18 US2267832
US02217281-1  Zemax 9.6 3.6 25   eyepiece, Cox example 2-17
US02217281-1  Oslo 0.04 3.33 1   eyepiece , cox 2-17
US02206195-3  Oslo 0.03 4.17 1   eyepiece , cox 2-16 US2206195,FIG.3
US02206195-2  Zemax 9.1 2.8 25   eyepiece, Cox example 2-15
US02206195-2  Oslo 0.04 3.33 1   eyepiece , cox 2-15 US2206195,FIG.2
US02206195-1  Oslo 0.02 2.63 1   eyepiece , cox 2-14 US2206195,FIG.1
US01968222-1  Oslo 0.04 2.50 1   eyepiece , cox 2-13 US1968222
US01759529-2  Zemax 9.1 2.5 25   eyepiece, Cox example 2-12
US01759529-2  Oslo 0.03 2.50 1   eyepiece , cox 2-12
US01759529-1  Zemax 9.1 3.1 25   eyepiece, Cox example 2-11
US01759529-1  Oslo 0.04 3.12 1   eyepiece , cox 2-11 US1759529,FIG.1
US01479229-4  Zemax 9.1 4.2 25   eyepiece, Cox example 2-09
US01479229-4  Oslo 0.04 4.17 1   eyepiece , cox 2-09 US1479229,EX.4
US01479229-3  Zemax 6.7 2.3 25   eyepiece, Cox example 2-08
US01479229-3  Oslo 0.04 4.17 1   eyepiece , cox 2-08 US1479229,EX.3
US01479229-1  Zemax 6.7 2.3 25   eyepiece, Cox example 2-07
US01479229-1  Oslo 0.04 4.17 1   eyepiece , cox 2-07 US1479229,EX.1
US01478704-2  Zemax 6.7 2.3 25   eyepiece, Cox example 2-06
US01478704-2  Oslo 0.03 2.50 1   eyepiece , cox 2-06
US01478704-1  Zemax 6.7 2.3 25   eyepiece, Cox example 2-05
US01478704-1  Oslo 0.03 2.50 1   eyepiece , cox 2-05 US1478704,FIG.1
US01366352-1  Zemax 11.1 2.8 25   eyepiece, Cox example 2-10
US01366352-1  Oslo 0.05 3.33 1   eyepiece , cox 2-10 US1699682
US01159233-4  Zemax 10.1 5.8 25   eyepiece, Cox example 2-04
US01159233-4  Oslo 0.04 2.50 1   eyepiece , cox 2-04 US1159233,EX.4
US01159233-3  Zemax 10.1 5.8 25   eyepiece, Cox example 2-03
US01159233-3  Oslo 0.04 3.33 1   eyepiece , cox 2-03 US1159233
US01159233-2  Zemax 10.1 5.8 25   eyepiece, Cox example 2-02
US01159233-2  Oslo 0.04 3.33 1   eyepiece , cox 2-02 US1159233
US01159233-1  Oslo 0.04 3.33 1   eyepiece , cox 2-01
UK565851-3  Oslo 0.06 1.67 1   eyepiece , cox 2-22 US565851,EX.3
UK565851-2  Zemax 17.5 2.6 25   eyepiece, Cox example 2-21
UK565851-2  Oslo 0.06 3.12 1   eyepiece , cox 2-21 BRITISH P.565851,EX.2
UK565851-1  Zemax 14.4 3.1 25   eyepiece, Cox example 2-20
UK565851-1  Oslo 0.06 2.50 1   eyepiece , cox 2-20 BRITISH P.565851,EX.1

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