TESTING TELESCOPES
STRAIGHT VI EWING – WITH DIGITAL DOUBLE MICROMETER
Testing telescopes with digital double micrometer allow the measurement of deflection angles in two directions. The programmable measuring gauges allow the operator to read the angular displacement in arcsec or mrad.
Application examples (additional collimator required):
■ Measurement of deflection angles
■ Parallelism measurement of uncoated flats
Notes on ordering:
■ Testing telescope eyepiece is commonly f=14,7 mm but can be equipped with eyepieces f=25 mm or f=10 mm on request.
■ One reticle and one eyepiece are included in the standard instrument.
■ If not specified otherwise, the testing telescope is adjusted to infinity at 546 nm wavelength. Adjustment to other distances or wavelengths is also possible on demand.
■ Please specify the unit of reading (mm or arcsec or mrad) when ordering.
■ The nomenclature of the testing telescopes with straightviewing and digital double micrometer is as follows:
Important: Please specify reticle when ordering.
Small-size Apertures with MDD
Art. No.
Description
Focal Length (mm)
Clear Aperture (mm)
Meas. Range
Resolution
L
227 201
FG 50/40/14.7 MDD
50
10
3.2°
5.0"
65
227 202
FG 90/40/14.7 MDD
90
16
2.0°
5.0"
65
227 203
FG 140/40/14.7 MDD
140
28
1.2°
2.0"
118
227 204
FG 200/40/14.7 MDD
200
28
0.8°
2.0"
173
227 205
FG 300/40/14.7 MDD
300
28
0.6°
1.0"
274
227 206
FG 500/40/14.7 MDD
500
28
0.4°
0.5"
474
Mid-size Apertures with MDD
Art. No.
Description
Focal Length (mm)
Clear Aperture (mm)
Meas. Range
Resolution
L
227 207
FG 300/65/14.7 MDD
300
50
0.6°
1.0"
233
227 208
FG 500/65/14.7 MDD
500
50
0.4°
0.5"
415
227 209
FG 500T/65/14.7 MDD*
500
50
0.4°
0.5"
233
*Compact design
Large-size Apertures with MDD
Art. No.
Description
Focal Length
(mm)
Clear Aperture
(mm)
Meas. Range
Resolution
D
a
b
c
d
e1
e2
227 212
FG 600/105/14.7 MDD
600
100
0.30°
0.5"
Ø128 f7
530
46
-
58
154
78
227 213
FG 1100/105/14.7 MDD
1100
78
0.16°
0.2"
Ø105 f7
1045
66
50
30
165
100