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BS ISO 14490-4:2005:2006 Edition

BS ISO 14490-4:2005:2006 Edition

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Optics and optical instruments. Test methods for telescopic systems – Test methods for astronomical telescopes

Published By Publication Date Number of Pages
BSI 2006 16
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This part of ISO 14490 is applicable to amateur astronomical telescopes.

For general optical test methods of telescopic systems see ISO 14490-1.

PDF Catalog

PDF Pages PDF Title
9 Figure 1 — Measurement of the focal lengths of objective lens or eyepiece
10 4.2.2 Focal length of objective mirror (method using a microscope with illuminator)
The test method described below does not apply to objective mirrors with central obscuration.
4.2.2.1 As shown in Figure 2 a), mount the objective mirror to be measured on the rotary table in front of
4.2.2.2 Move the microscope with illuminator to the position where the image of the reticle can be seen
11 Figure 2 — Measurement of focal length of objective mirror
12 4.3 Resolution
4.3.1 Resolution of main telescope
4.3.2 Resolution of finder telescope
13 5 Test report
Figure 3 — Test target and example of resolution test of main telescope
14 Bibliography
16 BS ISO
BSI — British Standards Institution
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BS ISO 14490-4:2005
$102.76