INDICO

Measurement of Prism Angles, Focal Lenghts and Surface Planeity

Angles between plane surfaces

Goniometer Moeller-Wedel model Goniometer II-VIS

Telescope/collimator: f = 300 mm

Accuracy of angle measurement: (mean error of series measurements) <0,6 arcsec.

Spectral range: 436 - 650 nm

Accuracy of refractive index measurements (mean error of series measurements): 10-5

Alignment: visual with autocollimator

Reading of incremental circle automatically via computer and built-in counter board

Evaluation automatically with GONIOWIN software

Spectral lines : F' (479,99 nm) - Cd, e (546,07 nm) – Hg, C' (643,85 nm) – Cd

Surface planeity

Interferometer Moeller-Wedel, model Melos 530-8, Software INTOMATIK-S for fringe evaluation

Type of interferometer: Fizeau

CCD Camera : 752 x 582 pixels

Laser: fiber coupled He-Ne 632.8 nm

Exit aperture: 50 mm

Measurement accuracy: l/10 (p-v) visual, l/20 (p-v) with software evaluation

Adjustment range: 530 mm

Fine adjustment range: 1 µm

Measurement range: 530 mm

Resolution: 1 µm

Accuracy: 3 µm

Granite base with threads for tilting table and XY-translation stage

Focal lengths

Focal length measurement device Moeller-Wedel, model Melos 530-3

Range of focal lengths: 5 mm ... 500 mm (positive), -5 mm ... -580 mm (negative), 2 mm ... 530 mm (back focal lengths)

Free aperture: 28 mm

Max. specimen diameter: 200 mm

Reproducibility: 0,04 % (focal lengths) or 0,03 % ... 0,2 % (back focal lengths)

Measurement accuracy: 0,3%

INDICO - LABORATORY OF CHARACTERIZATION AND DIAGNOSIS INFRASTRUCTURE BY OPTICAL AND COMPLEMENTARY METHODS