A Penta Prism is a five-sided reflective prism used to scatter a light beam by 90 °. The beam reflects twice inside the prism, allowing an image to be transmitted through a right angle without inverting it (i.e., without altering the handiness of the image) as an ordinary right-angle prism would.
|Axh (mm)||1 min deviation||30 sec Deviation||10 sec Deviation|
|7 x 6||PRS1100||PRS1110||PRS1120|
|10 x 10||PRS1101||PRS1111||PRS1121|
|15 x 15||PRS1102||PRS1112||PRS1122|
|20 x 20||PRS1103||PRS1113||PRS1123|
60-40 scratch and dig
R > 95% per face @ 630 to 680 nm
Aluminum and black painting are available
Penta Prism’s essential properties are the
- The Image is neither reversed nor rotated, only deviating by 90 °.
- With the prism, a constant angle of deviation refers to all rays transmitted by the useful aperture irrespective of the angles between those rays and the optical axis (or entrance and exit face normal).