ASTRO ELECTRONIC
Dipl.-Ing. Michael Koch
Raabestr. 43     D-37412 Herzberg     Germany
Tel: +49 (0)5521 854265    Fax:  +49 (0)5521 854266
www.astro-electronic.de e-mail
Neue und gebrauchte Referenz-Objektive für Interferometer
  New and used reference optics for interferometers

For used interferometers click here

For new or used translation and tip/tilt stages click here


New Transmission spheres from MPF optics
Surface Accuracy:
1/10 or 1/20 wave PV, 
1/ 30 or 1/40 wave upon request

Standard Zygo Bayonet

Please ask for prices
 
 

New: A special version with antireflective coating for Ritchey-Common Test is available as well.

New: Customer-specific transmission spheres with any f/number above f/15 are possible, converger or diverger, typical lead time 12 weeks

 

4" Objectives: 4" f/0.75 4" f/1.1 4" f/1.5 4" f/1.9 4" f/3.3 4" f/4.8 4" f/7.2 4" f/11
Numerical Aperture 0.67 0.48 0.33 0.26 0.15 0.10 0.07 0.05
F-Number 0.75 1.1 1.5 1.9 3.3 4.8 7.2 11
Angular Aperture 82.3° 55.6° 38.9° 30.3° 17.3° 12.1° 8.0° 5.4°
Radius of Reference Surface RM  [mm] -48.17 -65.50 -121.44 -163.12 -300.69 -449.0 -700.35 -1051.7
Maximum outside Sample Diameter DM allowed when accommodating Radii up to RM  [mm] 63.4 61.0 80.9 85.3 90.2 94.5 97.4 98.5
Maximum convex (concave) Radius that can be tested when outside Sample Diameter is larger than DM  [mm] 47 65 120 162 299 445 698 1049
Diameter x Length [mm] 127 x 70 127 x 70 127 x 70 127 x 65 127 x 70 127 x 70 127 x 70 127 x 70
Weight [kg] 2.41 2.3 1.72 1.65 2.08 1.7 1.63 1.44
Operating Wavelength [nm] 632.8 632.8 632.8 632.8 632.8 632.8 632.8 632.8
Input Diameter [mm] 101.6 101.6 101.6 101.6 101.6 101.6 101.6 101.6
Reference Element Fused Silica Fused Silica Fused Silica Fused Silica Fused Silica Fused Silica Fused Silica Fused Silica
Wavefront Deformation for single Pass
[Waves PV]
<1.5 <1.5 <1.5 <1.5 <1.0 <1.0 <0.5 <0.5
Operating Temperature [°C] 22 +- 8 22 +- 8 22 +- 8 22 +- 8 22 +- 8 22 +- 8 22 +- 8 22 +- 8

 
Long Radius 4" Objectives: 4" f/15
Converger
4" f/15 Diverger 4" f/24
Converger
4" f/24
Diverger
4" f/35
Converger
4" f/35
Diverger
90mm Flat  4" Flat 
Numerical Aperture 0.03 -0.03 0.02 -0.02 0.01 -0.01 - -
F-Number 15 -15 24 -24 34.9 -34.9 - -
Angular Aperture 3.7° 3.7° 2.4° 2.4° 1.5° 1.5° - -
Radius of Reference Surface RM  [mm] -1517.0 1517.0 -2449.4 2449.4 -3520 3500 - -
Maximum outside Sample Diameter DM allowed when accommodating Radii up to RM  [mm] 100.0 100.0 100.8 102.5 101.6 101.6 90 101.6
Maximum convex (concave) Radius that can be tested when outside Sample Diameter is larger than DM  [mm] 1515 -1515 2440 -2440 3500 -3490 - -
Diameter x Length [mm] 127 x 45 127 x 45 127 x 45 127 x 45 127 x 45 127 x 45 127 x 45 127 x 45
Weight [kg] 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9
Operating Wavelength [nm] 632.8 632.8 632.8 632.8 632.8 632.8 632.8 632.8
Input Diameter [mm] 101.6 101.6 101.6 101.6 101.6 101.6 90 101.6
Reference Element Fused Silica Fused
Silica
Fused Silica Fused Silica Fused Silica Fused Silica Fused Silica Fused Silica
Wavefront Deformation for single Pass
[Waves PV]
<0.4 <0.4 <0.4 <0.4 <0.4 <0.4 <0.4 <0.4
Operating Temperature [°C] 22 +- 8 22 +- 8 22 +- 8 22 +- 8 22 +- 8 22 +- 8 22 +- 8 22 +- 8

 
6" and 8" Objectives: 6" f/1.1 8" f/1.1 6" f/2.2 6" f/5.0 6" Flat 
Numerical Aperture 0.45 0.45 0.228 0.09 -
F-Number 1.1 1.1 2.2 5.0 -
Angular Aperture 53.49° 55.6° 26.36° 10.0° -
Radius of Reference Surface RM  [mm] ca. -109 -165.0 -284.90 -760.0 -
Maximum outside Sample Diameter DM allowed when accommodating Radii up to RM  [mm] 102.0 150.0 138.0 150.0 101.6
Maximum convex (concave) Radius that can be tested when outside Sample Diameter is larger than DM  [mm] 107 163 280 750 -
Diameter x Length [mm] 179 x 106 210 x 240 179 x 95 179 x 82 127 x 45
Weight [kg] 7.0 12.5 4.5 3.5 0.9
Operating Wavelength [nm] 632.8 632.8 632.8 632.8 632.8
Input Diameter [mm] 152.4 152.4 152.4 152.4 152.4
Reference Element Fused Silica Fused Silica Fused Silica Fused Silica Fused Silica
Wavefront Deformation for single Pass
[Waves PV]
<2.5 <2.5 <2.0 <1.5 <0.4
Operating Temperature [°C] 22 +- 8 22 +- 8 22 +- 8 22 +- 8 22 +- 8

 
All MPF Transmission Spheres come in a wood box and include a test certificate.
MPF optics

New Super 8" f/1.1 Transmission sphere

6" input, internal beam,
expander to 8" diameter,
true 6" f/1.1 output 

Surface Accuracy:
1/10 or 1/20  wave PV

Numerical aperture: 0.45
Radius of reference element: 165mm
 

Diameter 210 mm
Length 240 mm
Weight 12.5 kg

Zygo bayonet

Please ask for prices

MPF optics

4" --> 6" Beam expander

4"  Zygo bayonet

Please ask for prices


CaliBall TM

CaliBall is a 25.4mm diameter, high precision silicon nitride ball and kinematic mount used to calibrate phase-measuring interferometers by determining the errors in the transmission-sphere reference-surface.
The CaliBall is located with its center at the focus of the transmission sphere and aligned to better than one fringe. A measurement of the ball is taken, the ball picked up, arbitrarily rotated and replaced on its mount. The center of the ball will return to the original position due to the kinematic mount. Another measurement of the ball is then taken. 

This process is repeated about a dozen times and the interferograms averaged. The average represents the errors in the transmission sphere and interferometer because the ball is extremely round and the small imperfections of the ball average to zero. The calibration can be done in as little as 10 minutes and the result is difficult to dispute. Best used with low F/# transmission spheres.

Price:  650.- EUR plus VAT 
 
 
 

 

CaliBall2 TM
 

This is the second version of the CaliBall, which is used if the optical axis is horizontal. It fits into a standard 4" Zygo bayonet mount.

Price:  800.- EUR plus VAT 

 


Used Transmission Spheres
Surface Error
(Average of 10 measurements with CaliBall)
Please note that the concentric rings at the edge are artefacts of the CaliBall test, especially when testing f/3.3 or slower transmission spheres.
Description            Pictures
Jenfizar 4" f/0.75

Wood Box: no
Foam in Box: no

Notes:
Has a small scrarch on the reference surface, about 3mm long, at 4 o'clock 

Price:
5800.- EUR plus VAT

Zygo®
4" f/1.5 Series 2

This TS is in very good condition

Serial number: 010041

Includes the original Zygo calibration report from 2009, which claims PV 0.045 and RMS 0.004

My own measurement (with CaliBall) is only PV 0.068 and RMS 0.006

Wood Box: yes
Foam in Box: yes

Price:
6200.- EUR plus VAT

already sold

Jenfizar 4" f/3.3

This TS is new old stock, manufactured in 2006, never used, in perfect condition

Serial number: 4010

Includes the original calibration report from 2009, which claims PV 0.042 and RMS 0.006
(right click to enlarge)

Wood Box: yes
Foam in Box: yes

Price:
10200.- EUR plus VAT

Zygo®
4" f/3.3 Series 2

Stock Number:
#51

This TS is in very good condition, almost like new

Serial number: 00483

Includes the original Zygo test report, which claims PV 0.040 and RMS 0.005

My own measurement (with CaliBall) is only PV 0.071 and RMS 0.011 

Wood Box: yes
Foam in Box: yes

Price:
6000.- EUR plus VAT

Zygo® ?
4" f/3.3

Stock Number:
#52

Wood Box: yes
Foam in Box: no

Notes:
Has a small scrarch on the reference surface, about 5mm long and 0.1mm wide, near the center.
This TS has no labels, but I'm quite sure it's from Zygo

Price:
3500.- EUR plus VAT


Zygo® 
4" f/3.3

Stock Number:
#58

Wood Box: yes
Foam in Box: no

Upper phase map is for 100% aperture

Lower phase map is for 50% aperture

Price:
2300.- EUR plus VAT

Zygo® 
4" f/7.2

Stock Number:
#53

It comes with a test certificate that claims 0.074 waves PV, but my own measurement is only 0.098 waves PV

Wood Box: yes
Foam in Box: yes

Price:
3000.- EUR plus VAT


Zygo® COSTAR TEST LENS B.F.L. 1529mm

Serial Number: none, it's a one-of-a-kind item

Wood Box: yes
Foam in Box: yes

Notes:
I think it's a transmission asphere which was specially designed for testing the COSTAR instrument, which corrected the spherical aberration in the Hubble Space Telescope.

Price:
12000.- EUR plus VAT

(the 5-axis mount shown in the picture is not included)


Used Transmission Flats
Surface Error (Average of 10 measurements)
-- 4" or smaller optics were tested against a 4" 1/70 wave PVr flat
--Larger optics were tested against the central part of a 18" Zerodur TF from Zygo,
-- Aluminized optics were tested against a 6" 1/43 wave PV Dynaflect flat from Zygo
Description        Pictures
Zygo® 4" Reference Flat

This RF has a 90% Aluminium coating and is mounted backwards in the Zygo bayonet

AE stock number: 68

Wood Box: yes
Foam in Box: yes

Price:
1800.- EUR plus VAT

ADE Phaseshift 4" Transmission Flat

AE stock number: 69

Has Zygo Bayonet

Wood Box: yes
Foam in Box: yes

Price:
2000.- EUR plus VAT


Zygo® 4" Dynaflect Transmission Flat

Serial Number:  96054
AE stock number: 61
 

This TF has a damage in the coating, about 8mm x 5mm, which will produce a very bad PV reading (see upper phase map)
In the lower phase map I masked out this damage.

This TF is perfectly usable if your test piece is smaller than 70mm diameter, or if you only want to inspect the straightness of the fringes visually.

Wood Box: no
Foam in Box: no

Price:
1400.- EUR plus VAT

Click here for the Calibration Certificate from PTB, Germany's National Metrology Institute, made in June 2013:
Page 1   Page 2 Page 3   Page 4 Page 5
This calibration is also available as a MetroPro *.dat file

RMS over full 12" aperture: 0.011 waves @ 633nm
RMS over central 10" aperture: 0.009 waves @ 633nm
RMS over central 8" aperture: 0.006 waves @ 633nm
RMS over central 6" aperture: 0.003 waves @ 633nm


 
 

 

Zygo® 12" Reference Flat

-- Zerodur
-- 90% Aluminium coating
-- in perfect condition
-- including calibration certificate from PTB, see left side

Price:
20000.- EUR plus VAT

Zygo® 4" Transmission Flat
 

Serial Number:  unknown
AE stock number: 60

Wood Box: yes
Foam in Box: no

Price:
1400.- EUR plus VAT

CVI Technical Optics Ltd. 4"
Transmission Flat
 

This TF is new !

Serial Number:  6060313-11
AE stock number: 62

Wood Box: yes
Foam in Box: yes

Price:
1800.- EUR plus VAT

Zygo® 4" Transmission Flat
 

Serial Number:  unknown
AE stock number: 2

Wood Box: yes
Foam in Box: yes

Price:
1800.- EUR plus VAT
 

Wyko 100mm Transmission Flat
 

Serial Number:  unknown
AE stock number: 8

Wood Box: no
Foam in Box: no

Price:
1300.- EUR plus VAT

Zygo® 4" 90% Transmission Flat

Serial Number:  unknown
AE stock number: 12

Wood Box: yes
Foam in Box: no

Notes:
Has a high reflective coating which transmits only a few % of light. There are many small damages in this coating.

Price:
1000.- EUR plus VAT

4" Transmission Flat, unknown Manufacturer (maybe Zygo)

Serial Number:  unknown
AE stock number: 30

Wood Box: no
Foam in Box: no

Price:
1800.- EUR plus VAT

Zygo® 33mm Transmission Flat
 

Serial Number:  (00138)
AE stock number: 13

Wood Box: no
Foam in Box: no
 

Price:
700.- EUR plus VAT

Zygo® 33mm Transmission Flat

Serial Number:  (00136)
AE stock number: 9

Wood Box: no
Foam in Box: no

Price:
900.- EUR plus VAT

Zygo® 33mm Transmission Flat

AE stock number: 51

Wood Box: no
Foam in Box: no

Price:
700.- EUR plus VAT

Aluminized mirror in Aluminium cell, unknown manufacturer, optical diameter 103mm

Serial Number:  unknown
AE stock number: 65

Wood Box: no
Foam in Box: no

Price:
500.- EUR plus VA

Zygo® PRISM QUICK-CHECK

-- Zerodur Mirrors
-- usable mirror dimensions: 85mm x 55mm
-- Mirror distance: 101mm
-- 3-axis-stage (tip, tilt, rotation)
-- has some small damages on the reference mirrors
-- includes wood box with foam

Price:
7000.- EUR plus VAT

Used Aperture Converters
Zygo Aperture Converter 4" / 6"

In very good condition !

Including holder for heavy 6" transmission spheres

Wood Box: yes
Foam in Box: no

Price:
8000.- EUR plus VAT

already sold



Used Reference Spheres
zygo® Reference Sphere 37mm f/0.68 4%
 

-- 0.038 wave PV, 0.006 wave RMS,
-- used, in perfect condition,
-- original test certificate is included,
-- including wood box,
-- Price 2000.- EUR plus VAT

AE stock number: 71

zygo® Reference Sphere R=12.7mm, f/0.51 4%

-- used, in perfect condition, 
-- no test certificate included,
-- including wood box,
-- Price 1500.- EUR plus VAT

AE stock number: 72

zygo® Reference Sphere 37mm f/0.68 4%

-- used, in perfect condition, 
-- no test certificate included,
-- including wood box,
-- Price 1500.- EUR plus VAT

-- AE stock number: 73

zygo® Reference Sphere 37mm f/0.68 4%

-- 0.046 waves PV, 0.006 waves RMS
-- used, in perfect condition, 
-- original Zygo interferogram is included,
-- including wood box, no foam, 
-- Price 1800.- EUR plus VAT

AE stock number: 74


zygo® Retroreflector 7003A

-- very useful for critical alignment of transmission flats and apertue converters, see Zygo's application notes AN-0024 and AN-0029
-- the retroreflector can also be mounted from the other side
-- fits in Zygo's 4" XYZ stage, see next picture (the stage is not included)

-- Price 700.- EUR plus VAT


Used Objectives for Interference Microscopes:

Wyko PX 1.5 Michelson Objective 1500.- EUR plus VAT
Wyko PX 2.5 Michelson Objective 1500.- EUR plus VAT
Wyko PX 5 Michelson Objective 1500.- EUR plus VAT
Wyko PX 20 Mirau Objective 1500.- EUR plus VAT
Wyko PX 40 Mirau Objective 1500.- EUR plus VAT
Wyko IX 50 Objective   1500.- EUR plus VAT
Nikon/Zygo MPlan 2.5 TI / 0.075  Michelson Objective 1500.- EUR plus VAT


Yahoo Group "Interferometry", especially for any questions about interferometric testing of astronomical mirrors:   Yahoo Group Interferometry

Optische Formelsammlung: Allgemein      Optical formula collection: General

Optische Formelsammlung: Interferometrie      Optical formula collection: Interferometry

Linsen, Spiegel, optische Bauteile
 

If you need lenses, mirrors or other optical parts, have a look at Surplus Shed: