Penta Prism

The deviation angle of 90° is thus independent of the orientation of the prism, making it especially important in applications in which the prism orientation cannot be precisely controlled. Due to geometry that total internal reflection cannot be used, the reflecting surfaces must be coated with a metallic or dielectric coating. The standard Penta Prism reflecting surfaces are coated with aluminum or enhanced aluminum(see Coating chapter). Sometimes, the coated surfaces are with black painting.

Specifications

Material: BK7 Grade A or equivalent optical glass
Dimension Tolerance:±0.25mm
90° Deviation Tolerance:
Standard series: < 30 arc seconds
Precision series: up to 10 arc seconds
Flatness:
Standard series: l/2 at 632.8 nm
Precision series: up to l/4 at 632.8 nm
Reflectivity: R > 95% per face from 630 to 680 nm
Surface Quality: 60-40 scratch and dig

1 min. deviation 30 sec. deviation 10 sec. deviation
A x h(mm) Part No. Part No. Part No.
7 x 6 PTP0101 PTP0201 PTP0301
10 x 10 PTP0102 PTP0202 PTP0302
15 x 15 PTP0103 PTP0203 PTP0303
20 x 20 PTP0104 PTP0204 PTP0304

 

Precision Penta Prism

By adding a wedge, it can be used as Percision Penta Prism. It is often used in Plumb Level, Surveying, Alignment, Rangefinding and Optical Tooling.

Specifications

Material: BK7 Grade A or equvialent optical glass
Dimension Tolerance:±0.25mm
90 Deviation Tolerance:
Precision series: up to 2 arc seconds
Flatness:
Precision series: l/4 at 632.8 nm
Reflectivity: R > 95% per face from 630 to 680 nm
Surface Quality: 60-40 scratch and dig

  2.5 sec. deviation
A x h(mm)
Part no.
18 x 18
PTP0401

 

Beamsplitter Penta Prism

By adding a wedge and with partial reflective coating on surfaces S1, Penta Prism can be used as Beamplitter. Transmission/reflection(T/R) ratio of 20/80, 50/50 or others for Beamsplitter Penta Prism is available upon request.

Specifications

Material: BK7 Grade A or equvialent optical glass
Dimension (h) Tolerance:±0.1mm
Dimension (A) Tolerance:±0.2mm
90° , 180°Deviation Tolerance:
Standard series: < 30 arc seconds
Precision series: up to 15 arc seconds
Flatness:
Standard series: l/2 at 632.8 nm
Precision series: up to l/4 at 632.8 nm
Surface Quality :60-40 scratch and dig
Beamsplitter Ratio Transmission/Reflection: @630-680nm, T/R:20/80±5

  1 min. deviation 30 sec. deviation 15 sec. deviation
A x h(mm)
Part no.
Part no.
Part no.
7 x 6
SPP0101
SPP0201
SPP0301
10 x 10
SPP0102
SPP0202
SPP0302
15 x 15
SPP0103
SPP0203
SPP0303
20 x 20
SPP0104
SPP0204
SPP0304

 

Precision Beamsplitter Penta Prism

By adding a wedge and with partial refractive coating on surfaces S1, it can be used as a beamsplitter. The other wedge can increase precision of right angle beam. It is often used in Plumb Level, Surveying, Alignment, Rangefinding and Optical Tooling.

Specifications

Material: BK7 Grade A or equvialent optical glass
Dimension (h) Tolerance:±0.25mm
90° Deviation Tolerance:
Precision series: up to 2 arc seconds
180° Deviation Tolerance:
Precision series: up to 4 arc seconds
Flatness:
Precision series: up to l/4 at 632.8 nm
Reflectivity: R>95% per face @633nm
Surface Quality : 60-40 scratch and dig
Working Wavelength : 633nm

  2.5 sec. deviation
A x h(mm)
Part no.
18 x 18
SPP0401