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OFR manufactures and stocks a wide variety of Prisms. In addition to our standard product line listed below, we will specially fabricate prisms to custom specifications. We manufacture several standard Prisms in CaF2 for use in the ultraviolet. Please Inquire.

NOTE: high-energy excimer laser radiation may cause blue color center formation in CaF2. In such cases, MgF2, although very expensive, may be desirable. Please Inquire.

 


Right Angle Prism

The 45-45-90 degree Prism is the most commonly purchased of all our Prisms, and has several applications: to produce 90° reflection of light, to retro-reflect light (Porro Prism), and even as a front-surface mirror with the hypotenuse aluminized. The surfaces of these Prisms are flat within 1/10 -wave. Angles are within 3 minutes. In addition, we select from our production those Prisms to be used as the two components in making our SCL-series Beamsplitter Cubes. Please see BEAMSPLITTERS, page OC-20.
Mechanical Specifications
Dimensions
+0,-0.1 mm
Angles
±1-3 minutes
Surface Flatness
1/10-1/20 wave
Polish
10/5
Bevels
0.3 mm X 45°

 

Catalog
Number
Square
Aperture
Material Transmission
Spectrum
ADV-15 15 mm CaF2 130nm - 9.6µm
ADV-25 25 mm CaF2 130nm - 9.6µm
ADU-15 15 mm UV Silica 190nm - 2.5µm
ADU-25 25 mm UV Silica 190nm - 2.5µm
AD-15 15 mm Glass 380nm - 2.5µm
AD-25 25 mm Glass 380nm - 2.5µm
AD-51 51 mm Glass 380nm - 2.5µm

 


Pellin-Broca Prism

We fabricate Pellin-Broca in CaF2 for the vacuum-ultraviolet, and in UV-grade fused silica for the ultraviolet and near-infrared. These are designed so that the entrance and exit faces are approximately at Brewster’s angle for the design spectrum, thus minimizing reflection losses for p-polarized light.

 

Mechanical Specifications
Dimensions
+0,-0.1 mm
Angles
±1-3 minutes
Surface Flatness
1/10-1/20 wave
Polish
10/5
Bevels
0.3 mm X 45°

 

Catalog
Number
Square
Aperture
Material
Design
Spectrum
Limits of
Transmission
Separation
λ 2 - λ 1 *
Brewster's
Angle
ADBV-10
10 mm
CaF2
130nm - 250nm
9.6µm
~ 3°
56° - 59°
ADBV-20
20 mm
CaF2
130nm - 250nm
9.6µm
~ 3°
56° - 59°
ADBU-10
10 mm
UV Silica
190nm - 425nm
2.5µm
~ 7°
56° - 57°
ADBU-20
20 mm
UV Silica
190nm - 425nm
2.5µm
~ 7°
56° - 57°
ADB-10
10 mm
BK7
380nm - 2.5µm
2.5µm
~ 2°
56° - 57°
ADB-20
20 mm
BK7
380nm - 2.5µm
2.5µm
~ 2°
56° - 57°
NOTE: deviation is complex; Please inquire.
λ 2 - λ 1 refers to Design Spectrum extremes, for example 130/250 nm (ADBV).

 


Dispersion Prism

We fabricate Dispersing Prisms in CaF2 for the vacuum-ultraviolet, in UV grade fused silica for the ultraviolet, and in high-dispersion glass for the visible and near-infrared. These are designed so that the entrance and exit faces are approximately at Brewster's angle for the design spectrum, thus minimizing reflection losses for p-polarized light.

 

Mechanical Specifications
Dimensions
+0,-0.1 mm
Angles
±1-3 minutes
Surface Flatness
1/10-1/20 wave
Polish
10/5
Bevels
0.3 mm X 45°

ABSU-25

 

Catalog
Number
Prism
Face
Material
Design
Spectrum
Limits of
Trans.
Separation
λ 2 - λ 1 *
Brewster's
Angle
Apex
Angle
ABSV-15
CaF2
130nm - 250nm
9.6µm
~ 5 °
56° - 59°
69.9°
ABSV-25
CaF2
130nm - 250nm
9.6µm
~ 5 °
56° - 59°
69.9°
ABSU-15
UV Silica
190nm - 425nm
1.6µm
~ 12 °
56° - 57°
67.8°
ABSU-25
UV Silica
190nm - 425nm
1.6µm
~ 12 °
56° - 57°
67.8°
ABS-15
Inquire
SF14
380nm - 2.5µm
2.5µm
~ 10 °
56° - 57°
60.0°
ABS-25
SF14
380nm - 2.5µm
2.5µm
~ 10°
56° - 57°
60.0°
NOTE: deviation is complex; Please inquire.
λ 2 - λ 1 refers to Design Spectrum extremes, for example 130/250 nm (ABSV).

 


Coupling Prism (Rutile & GGG)

High index of refraction prisms are used for the coupling of light into films for the purpose of measuring film thickness and refractive index. We will gladly furnish a list of reference articles on the subject upon request. For the measurement of films whose index is above 1.8, our rutile crystal (TiO2) prisms are used. Extraordinary index is 2.865.

For films below index 1.8, we offer our prism in gadolinium gallium garnet (GGG), with index 1.965. All three prism faces are polished to ¼-wave flat.

 

 

Mechanical Specifications
Dimensions
+0,-0.1 mm
Angles
±1-3 minutes
Surface Flatness
1/10-1/20 wave
Polish
10/5
Bevels
0.3 mm X 45°

Indices of Refraction for
Coupling Prisms
Wavelength
GGG
no/ne
Rutile
no
ne
488 nm
1.988
2.732
3.042
633 nm
1.965
2.584
2.865
830 nm
1.951
2.513
2.779
1064 nm
1.944
2.479
2.733
1550 nm
1.936
2.453
2.694

 

Catalog
Number
Angles Dimensions Material
ADT-6 45-45-90° 6 x 6 mm base Rutile
AT-6 30-60-90° 6 x 6 mm base Rutile
ADG-6 45-45-90° 6 x 6 mm base GGG

Optics for Research · Ph 973-228-4480 · Fax 973-228-0915 · Email: info@ofr.com
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