Prisms maybe used in an optical system so that the exit beam may be reflected from the entrance direction.The images produced by prisms can be made inverted or rotated. |
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90 Degree Bending Prisms
90 Degree right angle bending prisms utilize the inherent total internal reflection (TIR) at the hypotenuse to invert the image and achieve a 90° change in direction. Antireflection coatings are applied to the two legs of a standard right angle prism (RAP) to maximize the overall throughput and reduce back-reflections off the interfaces to near zero. Because the internal reflection is independent of wavelength, these prisms can also be used as high energy 90° reflectors for broadband applications where metal mirrors are too absorbing and dielectric mirrors do not reflect a wide enough bandwidth. The Applications include UV beam routing, beam pick off, and variable delay lines as well as broadband, high energy 90° reflectors. High energy AR and BBAR coatings are applied to Legs. Unioriental also offer other dimensions and wavelengths in prototype and production quantities.
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Specifications
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Substrate Material |
fused silica or BK7 glass |
Surface Figure |
BK7: λ/4 at 633nm ；Fused silica: λ/10 at 633nm |
Dimensional Tolerance |
+ 0.00mm, - 0.25mm |
Angular Deviation |
± 3 minutes |
Chamfer |
0.35mm at 45° typical |
Coating Technology |
Electron beam multilayer dielectric |
Antireflection Coating |
Single wavelength AR-R ≤0.25% Broadband AR- Ravg ≤0.50% |
Surface Quality |
BK7: 20-10 Laser Quality ；Fused Silica:: 10-5 Laser Quality |
Adhesion and Durability |
Per MIL-C-675C. Insoluble in lab solvents |
Clear Aperture |
Exceeds central 85% of dimension |
Damage Threshold |
10J/cm2, 20ns, 20Hz; 1MW/cm2, CW @ 1064nm |
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90° Bending Prisms Part No. |
Dimension(mm) |
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BK7 |
Fused Silica |
ULRP0101 |
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A=B=C=5.0 |
ULRP0201 |
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A=B=C=10.0 |
ULRP0301 |
ULRP1301 |
A=B=C=12.7 |
ULRP0401 |
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A=B=C=15.0 |
ULRP0501 |
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A=B=C=20.0 |
ULRP0601 |
ULRP1601 |
A=B=C=25.4 |
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Note: Other dimension and specification are available upon requests.
Dove Prisms
Named for its inventor Harting Dove, dove prisms (with antireflection coatings on the ends) completely invert an image by 180 degrees. If the prism is rotated about its axis the image will rotate at twice the rate of rotation of the prism. Dove prisms provide a convenient and precise method of rotating a beam. The long length and square profile makes them easy to mount in a cylindrical sleeve.
Dove prisms need to be used with collimated or near-collimated beams because of the very limited field of view. When used as an image inverting prism the hypotenuse face acts as a TIR surface and is therefore normally not coated. Therefore, it is important to keep this surface clean.
UNIORIENTAL also offers Dove prisms AR coated on the hypotenuse for use in beam-folding applications. As the S1 and S2 sides are used in a total internal reflection (TIR) manner, it is extremely important to keep these two surfaces clean. |
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Specifications
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Substrate Material |
UV grade fused silica or BK7 glass |
Surface Figure |
λ /4 at 633nm before coating |
Dimensional Tolerance |
+ 0.00mm, - 0.25mm |
Angular Deviation |
± 3 minutes |
Chamfer |
0.35mm @ 45° typical |
Coating Technology |
Electron beam multilayer dielectric |
Antireflection Coating |
Single wavelength AR: R ≤0.25% Broadband AR: Ravg ≤0.50% |
Surface Quality |
20-10 Laser Quality on S1, S2, and bottom. Commercial polish on remaining sides. |
Clear Aperture |
Exceeds central 85% of dimension |
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Dove Prisms Part No. |
A(mm) |
B(mm) |
H(mm) |
UDVP0101 |
21.1 |
5.0 |
5.0 |
UDVP0201 |
42.3 |
10.0 |
10.0 |
UDVP0301 |
63.4 |
15.0 |
15.0 |
UDVP0401 |
80 |
20.0 |
20.0 |
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Note: Other dimension and specification are available upon requests.
Dispersing Prisms
Dispersing Prisms are used to seperate a beam of white light into its component colors. Generally, the light is first collimated and then dispersed by the prism. A spectrum is then formed at the focal plane of a lens or curved mirror.
In laser work, dispersing prisms are used to separate two wavelengths following the same beam path. Typically, the dispersed beams are permitted to travel far enough so the beams separate spatially. A prism exhibits magnification in the plane of dispersion if the entrance and exit angles for a beam differ. This is useful in anamorphic (one-directional) beam expansion or compression, and may be used to correct or create asymmetric beam profiles.
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Specifications
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Substrate Material |
UV grade fused silica SF-14 glass BK7 glass |
Surface Figure |
λ/2 at 633nm |
Dimensional Tolerance |
+ 0.00mm, - 0.25mm |
Angular |
θ=60°±3′ |
Chamfer |
0.35mm at 45° typical |
Surface Quality |
60-40~20-10, Scratch and dig. per MIL-PRF-13830B |
Clear Aperture |
Exceeds central 85% of dimension |
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Dispersing Prisms Part No.By Material
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Size(mm)
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SF-14glass
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UV Grade Fused Silica
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BK7 Glass
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UDPP0111 |
UDPP1101 |
UDPP0101 |
A=H=15 |
UDPP0112 |
UDPP1201 |
UDPP0201 |
A=H=20 |
UDPP0113 |
UDPP1203 |
UDPP0301 |
A=H=25 |
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Note: Other dimension and specification are available upon requests.
Pellin Broca Prism
It is composed by two 30° dispersion prisms and a right angle prism. The mutual Perpendicular surfaces are of the input and output
surfaces. When a beam incident in one of the two surfaces(S1&S2)at Brewster angle, then the beam will out-put at Brewster angle too
from another surface, and beam is deviated 90degree. It is often used as a dispersion prism. |
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Specifications
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Material |
BK7 grade A fine annealed optical glass UV grade Fused Silica |
Index of Refraction |
1.5183±0.0005 1.46008±0.00005 |
Design Wavelength |
546.1nm |
Dimension Tolerance |
+0.0,-0.2mm |
Clear Aperture |
＞80% |
Angle |
C=79.5°±0.5° ,D=60°±1° |
Flatness |
λ/10@632.8nm |
Surface Quality |
20-10, S/D |
Bevel |
0.2mm to 0.5mm |
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Pellin Broca Prism
Part No. By Material |
A(mm) |
B(mm) |
H(mm) |
BK7 |
Fused Silica |
UPBPBK112006 |
UPBPFS112006 |
11.0 |
20.0 |
6.4 |
UPBPBK234012 |
UPBPFS234012 |
23.5 |
40.0 |
12.7 |
UPBPBK366025 |
UPBPFS366025 |
36.0 |
60.0 |
25.4 |
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Note: Other dimension and specification are available upon requests.
Pyramid Prism
Pyramid prism or Corner Cube Retroreflectors have the property
that any ray entering will be reflected back to itself, regardless of
the entrance angle.
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Specifications
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Substrate Material |
BK7 Grade A optical glass, fused silica |
Surface Figure |
< λ/10 at reflection surface/4 on big surface |
Dimensional Tolerance |
+ 0.0mm, - 0.2mm |
Beam deviation |
180°±3or±5or±8 arc sec |
Chamfer |
0.35mm at 45° typical |
Surface Quality |
60-40 per MIL-PRF-13830B |
Clear Aperture |
Exceeds central 85% of dimension |
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Pyramid Prism Part No. |
D(mm) |
H(mm) |
Beam deviation |
BK7 |
Fused Silica |
UPPBK160100 |
UPPFS160100 |
160 |
100 |
±15" |
UPPBK7252 |
UPPFS7252 |
72.52 |
52.5 |
±3" |
UPPBK7041 |
UPPFS7041 |
70 |
41 |
±3" |
UPPBK6639 |
UPPFS6639 |
66.5 |
39.5 |
±3" |
UPPBK6448 |
UPPFS6448 |
64.5 |
48 |
±3" |
UPPBK6248 |
UPPFS6248 |
62.3 |
48 |
±3" |
UPPBK5037 |
UPPFS5037 |
50.8 |
37 |
±3" |
UPPBK4835 |
UPPFS4835 |
48 |
35 |
±3" |
UPPBK3828 |
UPPFS3828 |
38 |
28 |
±3" |
UPPBK3526 |
UPPFS3526 |
35 |
26 |
±3" |
UPPBK2519 |
UPPFS2519 |
25.4 |
19.3 |
±3" |
UPPBK1612 |
UPPFS1612 |
16 |
12.8 |
±5" |
UPPBK1211 |
UPPFS1211 |
12.7 |
11 |
±5" |
UPPBK1007 |
UPPFS1007 |
10 |
7.5 |
±15" |
UPPBK0806 |
UPPFS0806 |
8 |
6 |
±15" |
UPPBK0605 |
UPPFS0605 |
6.3 |
5 |
±15" |
UPPBK0505 |
UPPFS0505 |
5 |
5.5 |
±15" |
UPPBK0503 |
UPPFS0503 |
5 |
3.5 |
±15" |
UPPBK0403 |
UPPFS0403 |
4 |
3.5 |
±15" |
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Note: Other dimension and specification are available upon requests.
Wedge Prism
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Wedge prism is an optical element with plane-inclined surfaces; usually one face is inclined toward the other at a very small angle. It deflects light toward its thicker portion. It can be used individually to deflect a beam to a special angle. Two wedge prism works together can assembly an anamorphic prism to correct the elliptical shape of laser beam. The wedge prism is ideal for laser beam steering applications. By combining two wedge prisms which can be rotate individually, we can direct the input beam to anywhere within the cone angle θd, whereθd is 4x the specified angular deviation of one wedge. We can make deviation angle from 1deg to 10deg. Other angle can be realized upon request.
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- Material: BK7 ,Fused Silica
- Dimension Tolerance: +0.0/-0.1 mm
- Wedge Angle Tolerance: ±1arc minute
- Flatness: λ/4@632.8nm
- Flatness: λ/10—1λ@632.8nm
- Surface Quality: 60-40 scratch and dig
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Material: BK7 (Design Wavelength：632.8nm)
Wedge Prism Part No. |
Φ(mm) |
β |
α |
UWED0101 |
25.4 |
1° |
1°57′ |
UWED0201 |
25.4 |
2° |
3°53′ |
UWED0301 |
25.4 |
4° |
7°46′ |
UWED0401 |
25.4 |
6° |
11°39′ |
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Material: Fused Silica (Design Wavelength：308nm)
Wedge Prism Part No. |
Φ(mm) |
β |
α |
UWED1101 |
25.4 |
1° |
2°4′ |
UWED1201 |
25.4 |
2° |
4°7′ |
UWED1301 |
25.4 |
4° |
8°14′ |
UWED1401 |
25.4 |
6° |
12°21′ |
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