PRISMS
 
RIGHT ANGLE PRISM, GLASS  

Right angle prisms are used to achieve a 90° light path bend. Themage viewed through it will be erect and reverse left to right. The right angle prism can be used as total internal reflectors and mirrors (by coating hypotenuse surface). Two right angle prisms can be used as image erector.

These prisms are used to deflect a beam through 45° angle.

 
 

Specifications  
Material BK-7
Tolerance
dimensions ±0.2mm
angle ±3 arc mins
pyramid ±3 arc mins
Surface finish
quality 60/40
flatness /2 for surface upto 25mm side
Coating
(Optional)
Reflective coating of aluminium with SiO2 protected by black paint. Anti-reflection coating may be provided, if desired.
   
Size (mm)
Product No.
Comments
A=C B  
10 14 75221 Append suffix ‘AL’ to product No. for reflective and ‘AR’ for anti-reflective coating and specify faces to be coated.
15 21 75222
20 28 75223
25 35 75224
30 42 75225






 
Equilateral Dispersion Prisms  
These prisms have three equal 60° angles and are used as dispersion device to its constituent colours. Higher the refractive index of prism material, the greater will be the separation of wave length.
 
 

Specifications
Material BK7 (1.517),F2 (1.620),SF2 (1.648),SF1 (1.717)
 
Tolerance
dimensions ±0.2mm
angle ±5 arc mins
Surface finish
quality 60/40
flatness /2 for surface up to 25mm side
Coating
(Optional)
Entrance and exit surfaces may be provided with AR coating if desired.
Size(mm)
Product No.
A B C BK7 F2 SF2 F1
15.00 15.00 15.00 75251 75261 75271 75281
20.00 20.00 20.00 75252 75262 75272 75282
25.00 25.00 25.00 75253 75263 75273 75283
30.00 30.00 30.00 75254 75264 75274 75284
35.00 35.00 35.00 75255 75265 75275 75285


   
PENTA PRISMS  
These prisms are five sided prisms. They reflect light rays through an angle of 90° by reflections. They do not invert or revert the image. The reflecting surfaces are aluminised.These prisms also shorten the length of an instrument.

Specifications  
Material BK-7
Tolerance
dimensions +0/-0.1mm
beam deviation : 90°±5 arc mins
Surface
quality 60/40
flatness /2
Coating Reflection Surface aluminised with SiO2 over coating and protected by black paint. Entrance and exit surfaces may be provided with AR coating if desired.
   

Size(mm)
Product No.
A B C D
10.00 10.00 10.00 11.95 75231
15.00 15.00 15.00 15.96 75232
20.00 20.00 20.00 21.65 75233
25.00 25.00 25.00 27.90 75234
       

 









   
 
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