Lab equipment

From mn/astro/heliostat
Revision as of 11:17, 6 September 2010 by Gregal@uio.no (talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Lenses

Type Focal length Diameter Height of center
Telescope lens Achromatic air spaced doublet 1200 mm 150 mm ~163.5 mm
Collimator lens Achromatic doublet 1827 mm 203 mm ~163.5 mm
Imaging lens Achromatic air spaced doublet 1200 mm 150 mm ~163.5 mm
Singlet lens Thin singlet lens ~300 mm ~50 mm
Doublet lens Thick achromatic doublet lens, focal length written on edge ~100 mm ~50 mm
Doublet lens Thick achromatic doublet lens ~300 mm ~50 mm
Compound lens For illustration of coma ~50 mm
Compound lens For illustration of transversal chromatic aberrtion, aperture at rear end ~50 mm
Barrel lens Missing screw thread in middle, focus ~5 mm behind ~2.2 mm















Light sources

Lasers

Laser: connected with fiber

  • Description: laser connected with fiber to collimator tube.
  • Class: IIIb (3B), 5 mW. Note: when used with the collimator tube the effective output is below class II, i.e. no risk for the eye.
  • Wavelength: 635 nm.

Laser: stick

  • Description: black, long thick stick, He-Ne laser.
  • Class: II, 0.95 mW.

Laser: small tube

  • Description: small laser powered by 4.5 V flat battery.
  • Class: IIIa (3R), about 4.5 mW.

White light ray emitter

  • Description: white light ray emitter connected to collimator tube.
  • Wavelength: 360-1700 nm.
  • Stabilization time: 5 min.

Spectral lamp

  • Types of bulbs: neutral helium (He I) and neutral neon (Ne I).
  • He I lines should be easy to find:
Color Wavelenght (Å) Comments
Red 6678.15
Yellow 5875.6 Double lines (5875.6148 and 5875.6404 Å)
Turquoise 5015.68
Blue 4921.93
4713.2
4471.5
  • Note: from the spectra given by the manufacturer, one should also be able to see a red double line at 7065.3 Å and a violet line at 3888.65 Å. However, a picture with long exposure time will have to be taken in order to see them and the latter will still be extremely weak.