What is a Prism mirror?

A prism mirror is a mirror with a coating that reflects light on the slopes of a triangular pyramid-shaped glass device called a prism or on two sides at right angles.
The slope coat type with a coating on the slope can shorten the optical axis adjustment time when installing at an inclination of 45 °. In addition, the type of right-angled composition surface coat that coats two right-angled surfaces can invert and reflect the incoming light. In addition, it is necessary to select a coating (for example, wideband dielectric or metal) or glass as a base material according to the purpose.

Application of Prism mirror

The slope coat type is used when you want to tilt the light by 45 ° and reflect it. Although it can be realized with a flat mirror, it can shorten the time for adjusting the optical axis and is used in measuring instruments such as spectrophotometers. The right-angled surface coat type is used when the image is inverted at high speed or when you want to reflect the incoming light in a direction parallel to the optical axis such as an interferometer. It is also used as a mirror for taking in light with sunlight. Prism mirrors with a wideband anti-reflection BBAR coating are used in a wide range of low power laser line applications.

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