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Penta Prism Assembly - China

price: 120.00 Dollar US$

penta prism assembly

A pentaprism is a five-sided reflecting prism used to deviate a beam of light by a constant 90°, even if the entry beam is not at 90° to the prism. The beam reflects inside the prism twice, [1] allowing the transmission of an image through a right angle without inverting it (that is, without changing the image's handedness) as an ordinary right-angle prism or mirror would.

The reflections inside the prism are not caused by total internal reflection, since the beams are incident at an angle less than the critical angle (the minimum angle for total internal reflection). Instead, the two faces are coated to provide mirror surfaces. The two opposite transmitting faces are often coated with an antireflection coating to reduce spurious reflections. The fifth face of the prism is not used optically but truncates what would otherwise be an awkward angle joining the two mirrored faces.

Material:H-K9L, H-BaK7, etc;
Surface quality:40-20/20-10;
Dimensional tolerance:0.05mm;
Surface flatness:lambda/2;
Angle tolerance:3';
Parallelism tolerance:3'.


Company Contact:


  • Phone: 0086-769-86080086

  • Address: No.2 Xianglong Rd,Xincheng Dist,Shilong Town, Dongguan, Guangdong, China

  • Email: Email


Published date: August 25, 2016 - Modified date: August 25, 2016

  • Business Description: Taiyo Optics Co. Ltd. is a professional supplier of prism. It has been focusing on processing and manufacturing optical prism for more than 20 years. Taiyo has established its first factory in 1993 at China, Nanyang. The second factory in Dongguan, China was established in 2004. The products include optical prism, cylindrical lens, and other planar optical components.

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