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.
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.
