A brief introduction: the application of optical prism lenses in life

Optical lens is a glass product used for reflection in some special industries, it has a number of 90° Angle return incident beam, laser lens manufacturers, making its appearance to bring many benefits to mankind, today Kunshan Nole Optics and you talk about its one use.

Optical lens use introduction:

Mainly used in cameras, closed circuit television, projectors and various optical equipment

Telescope, microscope, level, fingerprint, solar energy converter and all kinds of measuring instruments

Cystoscope, gastroscope and all kinds of laser equipment.

An optical prism is a transparent device through which light can travel, usually made of glass. Because the end faces are not parallel to each other, refraction occurs (the direction of the beam changes), glass prisms are customized, and refraction is usually wavelength dependent due to the dispersion of the material. However, sometimes total reflection is required, and sometimes the direction of the outgoing beam is independent of the wavelength. The reflected light on the surface of the prism needs to be eliminated. When the light is P-polarized, the reflected light can be suppressed if the incident Angle is Brewster Angle. Anti-reflective coatings are sometimes used to eliminate reflected light. The function of the pentaprism in the SLR camera is very simple, if you do not use the pentaprism, only a single mirror is placed in the position of the pentaprism, the imaging must be reversed. Multiple reflections through the pentaprism are just enough to make the picture appear positive in the viewfinder. Pentaprism is equivalent to five mirrors. After many reflections to solve the picture inversion problem. After the scene passes through the lens group, it becomes an upside-down and left-right image. This image is reflected to the focusing screen through the flat mirror, which is mirrored by the single reflection on the flat mirror. The excess time taken for light to travel in a reflecting prism will increase the measured distance by a certain value, that is, the speed of light traveling in glass is slower than in air, octagonal prism, usually we call this increased value the prism constant. Usually the prism constant has been marked on the manufacturer's attached instructions or on the prism for use in distance measurement. When using a reflection prism that is not matched with the total station, it is necessary to first determine its prism constant. With the continuous improvement of the optometric level, the prism is increasingly appearing on the chu square of optometry. There are two common methods for making a prism. According to the law of refraction, light passes through the prism and is twice deflected to the bottom surface, and the Angle q between the outgoing light and the incident light is called the deflection Angle. Its size is determined by the refractive index n of the prism medium and the incidence Angle i. When i is fixed, different wavelengths of light have different deflection angles, the deflection Angle in visible light is the largest violet light, the smallest is red light, the excess time used for the propagation of light in the reflection prism will increase the measured distance by a certain value, that is to say, the propagation speed of light in the glass is slower than in the air.