Optical Experience - my "optical c.v."
Here is a list of most of the mirrors I have made or refigured, in
order of size. Sometimes I list mirrors that I am currently
working on, too.
If
a material is not given (e.g., plate), it's Pyrex. Elliptical
flats are indicated by "m. a.". Mirrors listed here include concave spheres, concave parabolas, concave
hyperbolas, convex hyperbolas, and elliptical and round flats.
Size Focal Ratio, comments
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2.75" ROC = 16.9", Cervit
Rumak Maksutov-Cassegrain secondary - refigured system to a null
3" ROC = -25.5", test plate
3" ROC = 25.5", Cass
secondary
3.1" m.a. Flat From Cave scope, refigured*
3.5" m.a. Flat From Meade 16" scope, refigured*
3.5" m.a. Flat Refigured commercial elliptical
flat
3.5" m.a. Flat Refigured commercial
elliptical flat
3.5" m.a. Flat Refigured commercial
elliptical flat
3.5" m.a. Flat Refigured commercial
elliptical flat
3.5" m.a. Flat Refigured commercial
elliptical flat
4" plate Flat Round, used for secondary testing
4" ROC = -47.5", test plate
4" ROC = 47.5", Cass
secondary
4" m.a. Refigured commercial elliptical
flat
4" m.a. Refigured
commercial elliptical flat
4" m.a. Refigured
commercial elliptical flat
4" m.a. Refigured
commercial elliptical flat from 16" Starliner
4" m.a. Refigured
commercial elliptical flat
4" m.a. Refigured
commercial elliptical flat
4.25" F/4.5 Primary for my 4.25" Newtonian
4.5" F/4.06, refigure
4.5" m.a. Flat Refigured commercial elliptical flat
5" ROC = -49.9", test plate
5" ROC = 49.9", Cass
secondary
5.25" F/8.8 refigure,
in my 5.25" scope
5.5" m.a. Flat refigure, for our
30" F/3.8 scope
6" F/6
(for my first travel scope)
6" F/8
(old Criterion primary with bad TDE - see Hall of Shame)*
6" plate F/8 From a
commercial scope*. Was quite overcorrected.
6" m.a. Flat Figured to ~1/8th wave
6" m.a. Flat Figured to ~1/8th wave
6.5" m.a. Flat (7/8" Pyrex, astrograph
secondary)
7" m.a. Flat Cellular, in progress
7" m.a. Flat Cellular, in progress
8" F/3.9 - My first mirror
8" round Flat (1/2" Pyrex)
8" round Flat (3/4" Pyrex)
8"
F/4.5 refigure* (was Coulter)
8" F/5.4 (for my
travel scope)
8" ROC
= 24.24".
R-C secondary for 28" F/4.4 system, refigured to null using my collimator.
8" m. a. Flat Cellular
mirror. Secondary
for 1.1m Newtonian.
8.25" m.a. Flat Solid Pyrex blank for a
large Newtonian.
9.13" plate F/4.3 For Russ Jocoy (see telescopes page)
10" plate F/6.8 refigure (in my 10" scope)
10" F/12.3 (reference
sphere)
10" F/6.3
refigure
10"
F/7 refigure
10" F/4.5
refigure* (horrifically rough optical surface, TDE)
10" F/8.8 (in my long
focus 10" scope)
10" F/5.5 (in my
shorter 10" scope)
10" F/6 Refigure of old Edmunds mirror
10" round Flat Figured for a friend
whose "reference flat" was actually not flat
12.5" F/6 (was
rough
Cave mirror* - see Hall of Shame)
12.5" F/6
(refigure)
12.5" F/4.2 (my perforated
Cass primary)
12.5" F/4 (was
half-corrected Cave mirror*)
12.5"
F/5 refigure, was Coulter*
12.5" F/6.07 refigure*
12.5" F/4.56 refigure (had
slight astigmatism, overcorrection)
12.5" F/4.77 refigure*
- was horrible commercial mirror with ~7 wave rolloff in
outer 1"
13.1" Plate F/4.5 3/4" plate glass for Russ Jocoy
(see telescopes page)
13.1" F/4.5 7/8" Pyrex
- now performing excellently in a Coulter tube.
13.1" F/4.5 1.25"
Pyrex. Was a rough Coulter*.
14.25" F/4.5 refigure*
14.25" F/3.75 (perforated Cass primary)
14.25" F/4.33 refigure
14.5" F/4
14.5" F/4
14.5" F/4 In progress
16" F/4
(my 16" scope)
16"
F/4.5 Meade Newt. primary refigure, was 0.5 waves
overcorrected.
16" F/4.25 Refigured Starliner primary mirror, 3" thick
16" F/4 Refigured* from mildly astigmatic figure
16.25" F/3.76 (perforated Cass primary)
16"
F/4.9 1.4" thick, custom focal length within 0.1" of
target, for Robert Houdart
16"
F/5 Mirror #1 for binoscope (ROC matched to #2
within 0.050")
16"
F/5 Mirror #2 for binoscope
16"
F/4 Refigure
16" F/4.25
16.5" F/3.7
16.5"
F/3.7
16.5"
F/3.7
16.5" F/3.7
16.5"
F/3.7
16.5"
F/3.7
16.5"
F/3.7
16.5" F/3.7
16.5" F/3.7
16.5" F/3.7
16.5" F/3.7 In progress
18" F/4.5
refigure*
18" F/4.4
refigure*
18" F/3.7
18" F/3.7
18" F/3.7
20"
F/3.3
Astrograph primary, 1.25" thick
20"
F/3 Future primary for fast Newt,
1.25" thick (figuring in progress)
20"
F/3 Future primary for my own R-C, 1.25" thick
(in progress)
20" F/3.8
20" F/3.7
20" F/4
20" F/3.7
24"
F/4.8 2" Pyrex - primary mirror for my collimator
24"
F/4.5 1.63" Pyrex (see Bob Holmes' 24" F/4.5 telescope)
24"
F/3.5 Cellular mirror
24"
F/3.7
25" F/3.8
refigure
25.5" F/4.2 Flatten back, refigure. 1.7" thick.
26" BVC
F/4.2 Grind, polish, figure. 1.75" thick.
27.5" F/4.0 Quartz, full-thickness classical Cassegrain primary mirror refigure
28" F/4.5
refigure*, was astigmatic, zony, and had correction issues
28"
F/1.1 refigure (Perforated R-C primary for F/4.4 RC system)
28"
F/3.7 Strong hyperbola
30" F/3.8 2.06"
thick, refigured 8/08 with a good machine
32" BVC F/4 regrind*,
2"-thick BVC blank for Bob Holmes (see 32" F/4 telescope)
38" F/3 Sphere, in progress
43.4" F/4
Cellular blank, planned for 2009
45" BVC F/? Planned for 2009
48"
F/4 Cellular blank, planned for 2009
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Mirrors I have helped others make:
6" F/8 (three so far)
6" F/6
8" F/6 (two), and several more of various sizes (12.5", etc) over email.