TESTING TELESCOPES FOCUS ADJUSTABLE – STR AIG HT VI EWI NG WITH DOUBLE
An adjustable focus telescope with mechanical double micrometer allows the distance between reticle and telescope objective to be adjusted for measurements made at other than infinity. Additionally, infinity can be set for different wavelengths of light. The scale division (SD) of the micrometer drums is 5 µm.
Application examples:
■ Adjustment of optical and mechanical systems
■ Qualitative testing of image quality of optical elements and systems (additional collimator required)
■ Testing at different wavelengths of light
■ Measurement of deflection angles (add. collimator required)
Notes on ordering:
■ 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 instrument.
■ The nomenclature of the focus adjustable testing telescopes with straight viewing and mechanical double micrometer is as follows:
Important: Please specify reticle when ordering.
Small-size Apertures with MD
Art. No.
Description
FL (mm)
CA (mm)
TE (mm)
MR
SD
Distance Range
L 227 661
FGV 90/40/14.7/±6 MD
90
16
±6
2.0°
11.5"
-∞...-1.25 m
+1.40 m...+∞
77±6 227 662
FGV 90/40/14.7/+12 MD
90
16
+12
2.0°
11.5"
+0.80 m...+∞
71+12 227 663
FGV 90/40/14.7/-12 MD
90
16
-12
2.0°
11.5"
-∞...-0.60 m
83-12 227 664
FGV 140/40/14.7/±6 MD
140
28
±6
1.2°
7.5"
-∞...-3.10 m
+3.30 m...+∞
77±6 227 665
FGV 140/40/14.7/+12 MD
140
28
+12
1.2°
7.5"
+1.70 m...+∞
71+12 227 666
FGV 140/40/14.7/-12 MD
140
28
-12
1.2°
7.5"
-∞...-1.40 m
83-12 CA = Clear Aperture FL = Focal Length TE = Tube Extension MR = Measurement Range
SD (scale division) = corresponding angle value in arcsec of one scale division of the micrometer screw
Small-size Apertures with MD
Art. No.
Description
FL (mm)
CA (mm)
TE (mm)
MR
SD
Distance Range
A
B
L
227 661
FGV 90/40/14.7/±6 MD
90
16
±6
2.0°
11.5"
-∞...-1.25 m
+1.40 m...+∞
220
245
173±25
227 662
FGV 90/40/14.7/+12 MD
90
16
+12
2.0°
11.5"
+0.80 m...+∞
220
270
148+50
227 663
FGV 90/40/14.7/-12 MD
90
16
-12
2.0°
11.5"
-∞...-0.60 m
220
220
198-50
227 664
FGV 140/40/14.7/±6 MD
140
28
±6
1.2°
7.5"
-∞...-3.10 m
+3.30 m...+∞
310
360
198±50
227 665
FGV 140/40/14.7/+12 MD
140
28
+12
1.2°
7.5"
+1.70 m...+∞
310
410
148+100
227 666
FGV 140/40/14.7/-12 MD
140
28
-12
1.2°
7.5"
-∞...-1.40 m
310
310
248-100
CA = Clear Aperture FL = Focal Length TE = Tube Extension MR = Measurement Range
SD (scale division) = corresponding angle value in arcsec of one scale division of the micrometer screw
Large-size Apertures with MD
Art. No.
Description
FL (mm)
CA (mm)
TE (mm)
MR
SD
Distance Range
L 227 676
FGV 1100/105/14.7/±50 MD
1100
78
±50
0.16°
1.0"
-∞...-23.70 m
+25.80 m...+∞
202±50 227 677
FGV 1100/105/14.7/+100 MD
1100
78
+100
0.16°
1.0"
+13.20 m...+∞
202+100 227 678
FGV 1100/105/14.7/-100 MD
1100
78
-100
0.16°
1.0"
-∞...-12.00 m
202-100 CA = Clear Aperture FL = Focal Length TE = Tube Extension MR = Measurement Range
SD (scale division) = corresponding angle value in arcsec of one scale division of the micrometer screw