The application of polarizing microscope in daily life
Polarization principle
In the simplest terms, natural light is a transverse wave, and the vibration direction is in all directions. A grating is placed in front of the light, which only allows light vibrating in one direction to pass through. Therefore, the light passing through the grating is polarized light.
A polarizing microscope is a type of microscope used to study so-called transparent and opaque anisotropic materials. Substances with birefringence can be clearly distinguished under a polarizing microscope. Of course, these substances can also be observed using staining, but some are impossible and must be observed using a polarizing microscope. Polarization microscope is an essential instrument for studying and identifying substances with birefringence using the polarization characteristics of light. It can be used by users for single polarization observation, orthogonal polarization observation, and cone light observation.
Application field:
Geological and mineral analysis: analysis of minerals and crystals.
Biological field: In living organisms, different fibrin structures exhibit significant anisotropy, and detailed information on the molecular arrangement in these fibers can be obtained using a polarizing microscope. Such as collagen, spindle during cell division, etc.
Identification of various biological and non biological materials, such as starch properties identification, drug composition identification, fiber, liquid crystal, DNA crystal, etc.
Medical analysis: such as stones, uric acid crystal testing, arthritis, etc.
Application of Polarization - Automotive Lights
When a car encounters a vehicle on the road at night, in order to avoid the glare of the headlights on both sides, the driver turns off the headlights and only turns on the small lights, slowing down the speed to avoid accidents. If the front window glass of the driver's cab and the glass cover of the car lights are both equipped with polarizers, and their polarization direction is specified to be in the same direction and at a 45 degree angle to the horizontal, then the driver can only see the light emitted by their own car lights from the front window, and cannot see the light from the opposite car lights. Therefore, when driving at night, neither turn off the lights nor slow down to ensure * * driving.
Application of Polarization - Stereoscopic Cinema
When shooting a stereoscopic movie, two cameras are used, and their lenses are equivalent to two human eyes. They simultaneously capture two portraits of the same object, and during projection, both portraits are simultaneously projected on the screen. If we try to make one eye of the audience only see one of the images, we can give the audience a sense of three-dimensional. For this reason, during projection, two projectors place a polarizer on each projector lens, with the polarization directions of the two polarizers perpendicular to each other. The audience wears glasses made of polarizers, and the polarization direction of the polarizer in the left eye is the same as that on the left projector. The polarization direction of the polarizer in the right eye is the same as that on the right projector, so that the two images on the screen are observed through two separate eyes, A three-dimensional image is formed in the human mind.
Polarizing microscope
Polarizing microscope is a type of microscope used to study so-called transparent and opaque anisotropic materials, and has important applications in science and engineering majors such as geology. Any substance with birefringence can be clearly distinguished under a polarizing microscope, and a reflection polarizing microscope is an essential instrument for studying and identifying substances with birefringence using the polarization characteristics of light.
