OPTICS
::
81
Diffraction gratings
Optical gratings, 30 x 45 mm
Optical gratings, 24 x 36 mm
A replicate grating mounted between two plane parallel
A replicate grating mounted between two plane parallel glass plates. Frame area: 48 x 63.5 mm.
plates of glass. Frame area: 50 x 50 mm. Grating area: 30 x 45 mm.
Grating area: 24 x 36 mm.
3250.00 Optical grating, 100 lines/mm
3245.00 Optical grating, 300 lines/mm 3250.10 Optical grating, 200 lines/mm
3245.10 Optical grating, 600 lines/mm 3250.20 Optical grating, 300 lines/mm
3245.20 Optical grating, 1200 lines/m 3250.30 Optical grating, 600 lines/mm
3245.00-.20
3250.00-.30
Diffraction grating (Rowland)
3255.05-.10
Diffraction grating glass copy on glass
carrier, grating surface approx. 25 x 25 mm. Carrier sur-
face 38 x 50 mm, thickness 4 mm, suited for spectro-
meter no. 3215.30
3255.05 Diffraction grating 300 lines/mm
3255.10 Diffraction grating 600 lines/mm
Grating model
It can sometimes be diffi-
cult for students to visual-
ize the optical diffraction
grating. Standard grat-
3260.00
ings have very small grat-
ings constants, so the line
spacing can not be seen.
Acoustic analogies are
difficult to set up and also
Experiment
challenge student under- E-6
1
standing. Using machine
0
screws with a well-defi-
ned pitch and 0.30 mm
3244.00
nylon line it is possible to
Diffraction grating
produce your own simple
A demonstration slide consisting of three gratings with
optical grating. Using a
grating constants of 100, 300 and 600 lines/mm respec -
laser beam and at a
tively. Each has an area of 9 x 16 mm. They are mounted
distance of 6 to 10 meters
between plane parallel glass plates in a cardboard slide
from the grating to a pro-
90 x 30 mm in size.
jection screen it is possible to clearly see the diffraction
pattern caused by this large spacing grating. This device
3260.00 Diffraction grating
provides students with a clearly visible example of an
operating optical grating.
3244.00 Grating model
®
Science Equipment for Education Physics
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