Pellicle
Beamsplitters
- No
change in optical path length between reflected and transmitted light
- Pellicles
eliminate second surface reflections
- Available
in 1, 2 and 4 inch clear apertures
- Thickness
uniformity is held to 2 waves per inch
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Pellicles are thin nitrocellulose films which are stretched over a
metal frame. Since they are less than 2 microns thick the reflected beams
from both surfaces are essentially superimposed upon each other. Uncoated
pellicles reflect 10% of the incident light when used at 45 degrees, thus
providing a useful, low-intensity side beam. These pellicles can also be
coated with various thin films in order to change the reflectivity and
provide for a range of useful splitting ratios. See accompanying reflectivity
curves. The pellicles are offered in three sizes 1 inch, 2 inch, 4 inch clear
aperture. |
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Pellicles are
only 2 microns thick - and yet they are surprisingly strong and rugged. Their
very low mass can survive considerable acceleration/deceleration without
deflection or damage.
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Pellicle Reflectivity
Curves
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Acoustical coupling can be a problem when the pellicle surface is
allowed to act like a drum-head. Pellicles, in general, should be used only in
acoustically quiet environments. |
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Pellicle Beamsplitters
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Aperture A |
Frame Diameter D |
Frame Thickness T |
Split Ratio R:T |
Price |
Product Number |
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(inches)
|
(inches) |
(mm) |
(inches)
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(mm) |
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1.00 |
1.38 |
34.9 |
0.19 |
4.8 |
10:90 |
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038-3340 |
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1.00 |
1.38 |
34.9 |
0.19 |
4.8 |
33:67 |
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038-3670 |
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1.00 |
1.38 |
34.9 |
0.19 |
4.8 |
40:40 |
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038-3880 |
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1.00 |
1.38 |
34.9 |
0.19 |
4.8 |
50:50 |
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038-3550 |
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- |
- |
- |
- |
- |
- |
|
-- |
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2.00 |
2.50 |
63.5 |
0.25 |
6.4 |
10:90 |
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038-3350 |
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2.00 |
2.50 |
63.5 |
0.25 |
6.4 |
33:67 |
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038-3680 |
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2.00 |
2.50 |
63.5 |
0.25 |
6.4 |
40:40 |
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038-3890 |
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2.00 |
2.50 |
63.5 |
0.25 |
6.4 |
50:50 |
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038-3560 |
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- |
- |
- |
- |
- |
- |
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-- |
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4.00 |
4.50 |
114.3 |
0.25 |
6.4 |
10:90 |
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038-3370 |
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4.00 |
4.50 |
114.3 |
0.25 |
6.4 |
33:67 |
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038-3770 |
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4.00 |
4.50 |
114.3 |
0.25 |
6.4 |
40:40 |
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038-4440 |
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4.00 |
4.50 |
114.3 |
0.25 |
6.4 |
50:50 |
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038-3580 |
Different sizes and splitting ratios are available on request.
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Merci de contacter Infos Photon Lines pour tout renseignement complémentaire. |
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