OXP-08 Optical Gratings  

Topics

Grating Constant
Amplitude / Phase Grating
Reflection / Transmission Grating
Ruled / Holographic Grating
Spectral Resolution
Diffraction Order


Examples of Investigation and Measurement

Wavelength of a laser
By using a grating with known grating constant the wavelength of a laser is determined. Through this result gratings with unknown parameters are investigated.

Spectrum of a light source
The diffraction of a line spectrum by a grating is performed. For higher diffraction orders the advantage of a larger spread of the spectrum and therefore a higher resolution is demonstrated. On the other hand the drawback of overlapping spectra in higher orders can be shown in this experiment.

Spectral resolution
In combination with a magnifying lens the lines of a spectral lamp are magnified. By varying parameters like grating constants or magnification their influence on the resolution of the apparatus can be determined and discussed.

Two-dimensional grating
The effect of a two-dimensional grating is shown on two crossed line gratings. The relations of the grating to the diffracted light pattern are demonstrated by twisting the two gratings or by using gratings with different grating constant.
 
 


Required Equipment

Cat. No.     Qty.     Description
02.0200      1        Profile rail, 200 mm
02.0300      1        Profile rail, 300 mm
02.1022      1        Screen holder, carrier 25
02.1602      1        Optical screen, 80x65, scale
02.2126      2        Mounting plate, click 25, carrier 20
02.2152      1        Mounting plate, click 50, carrier 20
02.6106      1        Adjustment holder, 4 axes, carrier 20
04.0054      1        Biconvex lens f=150 mm, 40, click 50
04.0061      1        Plano convex lens f=40 mm, 22.4, click 25
02.0200      1        Profile rail, 200 mm
05.0106      1        Spectral lamp, slit, power supply
05.0226      1        DIMO 532 (green)
07.0010      1        BNC - banana adapter connection leads 2x4 mm plugs
07.0102      1        Photodetector, Si PIN, in housing
07.0206      1        Active power supply LDD-05
09.1746      1        Beam expander magnification 6x
09.1810      1        Optical grating assembly
09.1848      1        Beam expander x 2.7
19.0400      1        Digital multimeter 3 ½ digits