What are the main functions of the lens?

What are the main functions of the lens?

The lens has two fingers in the film and television. One refers to the optical component used by the movie camera and the projector to generate the image. The continuous picture taken from the start to the shutdown, or the segment between the two splice points, also called a Lens. So what is the use of the lens? Next, Xiaobian introduces the main functions of the lens, let's take a look!
Introduction of the lens
The lens has two fingers in the film and television. One refers to the optical component used by the movie camera and the projector to generate the image. The continuous picture taken from the start to the shutdown, or the segment between the two splice points, also called a Lens.
One finger and two fingers are two completely different concepts. In order to distinguish the difference between the two, one refers to the optical lens and the second refers to the lens. According to the origin of the lens, it is mainly Japanese and German lenses. The Japanese lens is mainly a reduction in color, and the German lens has a stronger layering. The Chinese lens in the market has gradually occupied a certain market, mainly because the price is relatively low.
Lens classification
According to the origin of the lens, it is mainly Japanese and German lenses. The Japanese lens is mainly a reduction in color, and the German lens has a stronger layering. The Chinese lens in the market has gradually occupied a certain market, mainly because the price is relatively low.
camera lens
The classification of the lens can be classified according to the focal length, the aperture division, and the lens adjustment according to the lens.
(1). According to the focal length classification, there are fixed focal length type, telescopic type, automatic aperture or manual aperture type.
(2). According to the focal length number, the standard lens, wide-angle lens, telescope head and other types are classified.
(3). According to the aperture classification, there are fixed iris type, manual iris type, and auto iris type.
(4). According to the lens telescopic adjustment method, there are types such as an electric telescopic lens and a manual telescopic lens.
What are the performance of the lens?
According to the performance and shape of the lens, there are currently P, E, L and auto zoom lenses. The data from China Instrument Supermarket are described as follows:
P-type lens
(1) The automatic positioning lens has its own focus adjusted, and it is necessary to check the sharpness from the maximum magnification to the minimum magnification, whether it is consistent or clear.
(2) Check the coaxiality, that is, the maximum magnification to the minimum magnification is taken at the same position, and the offset cannot be offset or the offset is too large. It is regarded as a defective product, and the lens must be replaced.
(3) The optical magnification is 0.7-4.5X, that is, a total of nine magnifications between 0.7 times and 4.5 times.
(4) The sharpness is judged based on the correction block and the actual object imaging reflection.
2. E-type lens
(1) This lens is a common industrial lens. It needs to adjust the focus manually. After the machine is installed, when the maximum magnification and the minimum magnification are manually adjusted, the image is equally clear. If the resolution cannot be adjusted, it is regarded as a defective product. Unstable factors such as shaking of the rear lens exist and are considered as defective products.
(2) Check the coaxiality, that is, the maximum magnification to the minimum magnification is taken at the same position, and the offset cannot be offset or the offset is too large, which is regarded as a defective product, and the lens must be replaced.
(3) The optical magnification is 0.7-4.5X.
(4) The sharpness is interpreted based on the correction block and the actual object imaging reflection.
3. L-type lens
(1) This lens is a common industrial lens. It needs to adjust the focus manually. After the machine is installed, when the manual adjustment is made to maximize the magnification and the minimum magnification, the image is equally clear. If the resolution cannot be adjusted, it is regarded as a defective product. Unstable factors such as shaking of the rear lens exist and are considered as defective products.
(2) Check the coaxiality, that is, the maximum magnification to the minimum magnification is taken at the same position, and the offset cannot be offset or the offset is too large, which is regarded as a defective product, and the lens must be replaced.
(3) The optical magnification is 0.7-4.5X.
(4) The sharpness is interpreted based on the correction block and the actual object imaging reflection.
4. Auto zoom lens
(1) In order to automatically position the lens itself, the focus has been adjusted. It is necessary to check the sharpness from the maximum magnification to the minimum magnification, whether it is consistent and clear.
(2) Check the coaxiality, that is, the maximum magnification to the minimum magnification is taken at the same position, and the offset cannot be offset or the offset is too large. It is regarded as a defective product, and the lens must be replaced.
(3) The optical magnification is 0.7-4.5X.
(4) The sharpness is interpreted based on the correction block and the actual object imaging reflection.

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