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Optical Prism

Optical Prism

Prism, a transparent object surrounded by two planes that intersect but are not parallel to each other, used to split light or disperse light beams. A prism is a polyhedron made of transparent materials (such as glass, crystal, etc.). It is widely used in optical instruments. Prisms can be divided into several types according to their properties and uses. For example, the "dispersion prism" that decomposes the composite light into the spectrum in a spectroscopic instrument, the more commonly used is an equilateral prism; in a periscope, binocular telescope and other instruments, the direction of light is changed to adjust its imaging position. "Reflecting prisms" generally use right-angle prisms. BRD Optical provides different types of optics/optical prisms for sale, such as roof prism, pyramid prism /petrahedral prism, penta prism.

Optical Prism Applications

A prism is a polyhedron made of optical glass. It is widely used in optical instruments. Prisms can be divided into several types according to their properties and uses. For example, the "dispersion prism" that decomposes the composite light into the spectrum in a spectrometer is more commonly used is an equilateral prism; in a periscope, binocular telescope and other instruments, the direction of light is changed to adjust its imaging position. "Reflecting prisms" generally use right-angle prisms.


The plane where the light enters and exits is called the side, and the plane perpendicular to the side is called the main section. According to the shape of the main section, it can be divided into three prisms, right-angle prisms, pentagonal prisms, etc. The main cross-section of the prism is a triangle, with two refracting surfaces, the angle between them is called the apex angle, and the plane opposite to the apex angle is the bottom surface. According to the law of refraction, the light passes through the prism and is deflected to the bottom twice. The angle q between the emitted light and the incident light is called the deflection angle. Its size is determined by the refractive index n and the incident angle i of the prism medium. When i is fixed, different wavelengths of light have different deflection angles. Among visible light, the largest deflection angle is purple light, and the smallest is a red light.


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