稜鏡的功用是色散、光線偏折及影像倒像。利用稜鏡的最小偏向角可測玻璃材料

The functions of Yan Han are dispersion, deflection of light, and image inversion. Using the minimum deflection angle of 珜 鏡 can measure the refractive index of glass materials. The plane mirror can also change the direction of the light, but the glass plate used to make the plane mirror is not very parallel, and this will cause double images. Therefore, aluminum must be plated on the glass plate to increase the reflectivity. The quality requirements are strict, so Many optical instruments often use 珜 鏡 as a way to change the direction of light.

The function of prisms is dispersion, light deflection, and image reversal. The refractive index measurement of glass material can be measured using the minimum bias angle of the prism. Plane mirrors can also change the direction of light, but the glass plate used to make flat mirrors is not a good parallelity, so there will be a double image, so must be plated on the glass plate aluminum to increase reflectivity, quality requirements are more stringent, so many optical instruments often use prisms as a change of light direction.

The function of prism is dispersion, deflection of light and image inversion. The refractive index of glass material can be measured by using the minimum deflection angle of prism. The plane mirror can also change the direction of light, but the glass plate used to make the plane mirror is not well parallel, so there will be double images. Therefore, aluminum plating on the glass plate is necessary to increase the reflectivity, and the quality requirements are strict Therefore, many optical instruments often use prism to change the direction of light.