Stock Number: #115

Wood Box: no
Foam in Box: no

This transmission sphere has a few very small damages on the reference surface (black dots in the phase map). Each of them is smaller than 1mm.

The phase map is for 100% aperture, measured with CaliBall
(20 measurements averaged)

Price:
10500.- EUR plus VAT

already sold

Stock Number: #116

Wood case: yes
Foam in case: no

Phase map is for 95% aperture (tested against the central part of a 1/40 wave 4" f/0.7 transmission sphere)

Price:
4500.- EUR plus VAT

already sold

Stock Number: #111

Aluminium case: yes
Foam in case: yes

Phase map is for 95% aperture (tested against the central part of a 1/40 wave 4" f/0.7 transmission sphere)

Price:
10500.- EUR plus VAT

Stock Number: #69

Bayonet diameter is 70mm

Wood Box: yes
Foam in Box: yes

Phase map is for 95% aperture

Price:
3200.- EUR plus VAT

Stock Number: #34

Wood Box: no
Foam in Box: no

Phase map is for 95% aperture

Price:
800.- EUR plus VAT

Zygo® 
33mm f/1

Stock Number: #66

Wood Box: yes
Foam in Box: no

Phase map is for 100% aperture

This lens shows spurious fringes near the center, possibly because the AR coating is missing on some surface, or because it's designed for another wavelength.

Price:
800.- EUR plus VAT

Stock Number: #32

Wood Box: no
Foam in Box: no

Phase map is for 95% aperture

Price:
700.- EUR plus VAT

Stock Number: #31

Wood Box: no
Foam in Box: no

Phase map is for 95% aperture

Price:
1200.- EUR plus VAT

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)

AE stock number: 119

The phase map is for 95% aperture

The flat has a small damage in the glass, about 1-2mm wide. In the phase map it's the largest black dot at 11 o'clock. MetroPro did automatically mask it out. The other black dots are only dust.

Wood Box: yes
Foam in Box: no

Price:
3800.- EUR plus VAT

already sold

AE stock number: 121

Wood Box: yes
Foam in Box: yes

Price:
1800.- EUR plus VAT

AE stock number: 124

This flat has an old original test report from Zygo from 1989, PV 0.050 waves, RMS 0.011 waves.

Wood Box: yes
Foam in Box: no

Price:
1500.- EUR plus VAT

AE stock number: 37

Wood Box: no
Foam in Box: no

Price:
1500.- EUR plus VAT

This flat was not designed for 633nm. I don't know for which wavelength it is. It can be used at 633nm, if you use the darker of the two alignment spots. The brighter spot is from the back side!

Phase map is for 95% aperture.

AE stock number: 96

Wood Box: no
Foam in Box: no

Price:
2600.- EUR plus VAT

AE stock number: 92

It can't be used as a transmission flat because the back  side has too much curvature.

Wood Box: yes
Foam in Box: no

Price:
1800.- EUR plus VAT

AE stock number: 46

It can't be used as a transmission flat because the back  side has too much curvature.

Wood Box: yes
Foam in Box: yes

Price:
2200.- EUR plus VAT

AE stock number: 113

This flat has an antireflection coating for 830nm on the back side. You can use it at 633nm, but then you must select the darker of the two alignment spots. At 633nm the spot from the back side is the brighter one.   

Wood Box: no
Foam in Box: no

Price:
900.- EUR plus VAT

already sold

This flat has a coating for testing of highly reflective samples. In very good condition.

AE stock number: 95

Wood Box: no
Foam in Box: no

Price:
2400.- EUR plus VAT 

already sold

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

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

Serial Number:  unknown
AE stock number: 8

Wood Box: no
Foam in Box: no

Price:
1300.- EUR plus VAT

Stock Number: #76

Outer Aluminium housing is missing, but that's onyl a cosmetic problem

Wood Box: yes
Foam in Box: yes

Phase map is for 95% aperture

Price:
2000.- EUR plus VAT

Stock Number: #77

Wood Box: yes
Foam in Box: no

Phase map is for 95% aperture

Price:
2000.- EUR plus VAT

Stock Number: #78

With internal 6mm transmission flat

Wood Box: no
Foam in Box: no

Phase map is for 95% aperture

Price:
1500.- EUR plus VAT

Stock Number: #107

With internal 6mm transmission flat

Wood Box: no
Foam in Box: no

Left side: Phase map is for 70% aperture

Below: Phase map is for 95% aperture  

Price:
1800.- EUR plus VAT

AE stock number: 51

Wood Box: no
Foam in Box: no

Price:
700.- EUR plus VAT

 already sold

AE stock number: 25

Wood Box: yes
Foam in Box: no

Price:
1000.- EUR plus VAT

AE stock number: 26

Wood Box: yes
Foam in Box: no

Price:
850.- EUR plus VAT

already sold

AE stock number: 27

Wood Box: yes
Foam in Box: no

Coating on the back side is optimized for 830nm, but it's no problem to use it at 633nm

Price:
1050.- EUR plus VAT

AE stock number: 29

Wood Box: yes
Foam in Box: no

Upper phase map shows two small damages (small red dots) which raise the PV to 0.064 waves. 

In the lower phase map these peaks are masked out, so that PV in only 0.029 waves.
 

Price:
400.- EUR plus VAT

already sold

AE stock number: 10

Wood Box: no
Foam in Box: no

Price:
850.- EUR plus VAT

AE stock number: 11

Wood Box: yes
Foam in Box: no

Price:
1000.- EUR plus VAT

AE stock number: 12

Wood Box: yes
Foam in Box: yes

Price:
1100.- EUR plus VAT

-- used, in very good condition

-- The left phase map is for 95% aperture

-- including wood box

-- Price 650.- EUR plus VAT

-- AE stock number: 18

-- used, the back side is damaged

-- no test certificate included

-- including wood box, but without foam

-- Price 1300.- EUR plus VAT

-- AE stock number: 20

-- Protective lids on both sides 
-- Post has 12mm diameter
-- including wood box

Price: 700 EUR + VAT

-- 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