Polarized microscope and polarized light in daily life applications
The principle of polarization is the most
In general terms, natural light is a transverse wave, the vibration direction is in all directions, in front of the light put a grating, this grating only allows a certain direction of vibration of the light can pass, then through the grating after the light is polarized light.
A polarizing microscope is a microscope used to study so-called transparent and opaque anisotropic materials. Substances with birefringence can be distinguished clearly under a polarizing microscope. Of course, these substances can also be observed by staining, but in some cases, this is not possible, and a polarizing microscope must be used. Polarizing microscope is a necessary instrument for the research and identification of birefringent substances by using the polarization property of light, which can be used for single polarized light observation, orthogonal polarized light observation and conical light observation by a wide range of users.
Application Fields:
Geology and mineral analysis: such as the analysis of minerals and crystals.
Biological field: In living organisms, different fiber protein structures show obvious anisotropy, using polarized light microscope can get the details of molecular arrangement in these fibers. For example, collagen, spindle humorous filaments during cell division.
Identification of various biological and non-biological materials: such as identification of starch properties, identification of pharmaceutical ingredients, fibers, liquid crystals, DNA crystals and so on.
Medical analysis: such as stones, uric acid crystal detection, arthritis, etc.
Polarized light application-automobile lights
Cars traveling on the highway at night and the opposite side of the vehicle encounter, in order to avoid both sides of the glare of the lights, the driver are turned off the headlights, only open the small lights, slow down the speed, in order to avoid a car accident. If the front window glass of the driver's cab and the glass cover of the lamps are equipped with polarizer, and the provisions of their polarization direction are along the same direction and with the horizontal plane at an angle of 45 degrees, then, the driver from the front window can only see from the lamps issued by their own light, and can not see the opposite side of the lamps of light, so that the car is driving at night, do not turn off the lamps, but also do not slow down to ensure that the safety of the car.
Polarized light application-stereoscopic film
In the shooting of three-dimensional film, with two cameras, two camera lenses equivalent to two eyes, they were photographed at the same time the same object of the two images, the projection of the two images at the same time on the screen. If you try to make the audience's one eye can only see one of the picture, you can make the audience get a sense of three-dimensional. For this reason, in the projection, two projectors each projector lens on a polarizer, two polarizers polarization direction perpendicular to each other, the audience to wear glasses made of polarizer, the left eye polarizer polarization direction and the left side of the projector on the same direction of polarization, the right eye polarizer polarization direction and the right side of the projector on the same direction of polarization, so that the two images on the screen were through the two eyes respectively The two images on the screen are observed by the two eyes, and a stereoscopic image is formed in the human mind.
Polarized light microscope
Polarizing microscope is a type of microscope used to study the so-called transparent and opaque anisotropic materials, which has important applications in geology and other science and technology disciplines. Any birefringent material can be clearly distinguished under a polarizing microscope, and a reflective polarizing microscope is a necessary instrument for the study and identification of birefringent materials by using the polarizing properties of light.
