Why should the cold light source of the microscope have different color temperatures?

The concept of color temperature is contrasted by the number of degrees at which the black iron becomes what color. For example, the brightness of the color temperature at 3700K is the color of black iron at a temperature of 3700 degrees. The color temperature is too high, the color will change, if it exceeds 4000k, the color will have ultraviolet light, if it reaches more than 7000k, it will basically be blue light.

UV light is a good example. The brightness of the object under the microscope is different, and if the color temperature is too high, it will also produce light like ultraviolet rays, and it will also produce light such as infrared.

It seems that it varies depending on the situation of different lighting occasions and different materials.

When an object emits light, its temperature is not higher than the ambient temperature, and we call this type of light source a cold light source.

Medical endoscopes use a light source that does not generate heat.

Structure and composition of endoscope:

The product is a double-lamp structure, halogen lamp; The product is equipped with an air pump air supply device.

Main technical indicators: the maximum temperature of the outer surface of the whole machine is not more than 60; The temperature of the lighting surface of the cold light source should not exceed 150; Illuminance 70000lx; The pressure of the air pump is 30-60kpa, and the air flow rate is 4--10l min; The color temperature should not be less than 3200K, and the color rendering index should not be less than 90; The noise of the whole machine is not greater than 55dB(A).

The objective lens is divided into 1x, 2x, 3x, 4x, 10x, 20x, 40x, 65x, 100x, there are no 200x and 1000x, it may be that you are wrong, the higher the multiple, the less light will enter, the higher the multiple, the darker you see, which is normal! Don't use sunlight when spotting the light, or your eyes will go blind! If you buy a microscope, you should choose an objective lens with flat achromatic, and if you make yourself, you should use a concave lens to correct chromatic aberration.

When using a microscope at 200x and 1000x, the color of the object should not change.

The color changes because the quality of the lens is not good! Try using a plan achromatic objective. See.

This is due to different light, different refractive indexes.

The endoscope cold light source is mainly composed of medical bulbs, dielectric film cold reflectors, controllers, miniature axial fans, and electromagnetic pumps. Main technical indicators: 1. Diameter of the output hole of the light source:

8mm±；2. The cold light source can work normally for 8 hours continuously; 3. The color temperature of the cold light source is 6000K 500K; 4. The illumination of the cold light source is continuously adjustable. 5. Cold light source model and configuration: LG3000A type:

The lamp power is 8V50W, the maximum illumination is 1100000LX, and there is no air pump; LG3000B: bulb power 15V150W, maximum illuminance 1400000LX, without air pump; LG3000C type: lamp power 24V150W, maximum illumination 1600000LX

Guidelines for the Technical Review of the Registration of Cold Light Sources for Medical Endoscopes:

Except for special spectral uses, the cold light source of medical endoscopes suitable for optical observation mirrors, the relevant color temperature should be in the range of 3000 7000K.

This depends on the requirements of the object you observe, and now many microscopes will have a cold light source, that is, an LED light source, and the service life of the LED light source will be longer. No need to change the bulb when you get old.

Cold light sources are light sources that use chemical energy, electrical energy, and biological energy to excite (fireflies, neon lights, etc.). It has very excellent optical and variable flash characteristics. When an object emits light, its temperature is not higher than the ambient temperature, this kind of luminescence is called cold luminescence, and we call this kind of light source cold light source.

Cold light source is a new high-tech light source after incandescent lamp, LED and LCD light source products.

The luminescence principle of the cold light source is to generate electron collision under the action of an electric field to excite the fluorescent material to produce luminescence. It has very excellent optical and variable flash characteristics. The cold light source does not generate heat when working, avoiding a series of problems associated with heat accumulation.

The characteristic of the cold light source is that almost all other energy is converted into visible light, and there are few other wavelengths of light, while the thermal light source is different, in addition to visible light, there is also a large amount of infrared light, and a considerable part of the energy is converted into infrared light that does not contribute to lighting. The light coming out of the thermal light source and the infrared filter should be about the same as the light emitted by the cold light source, because the infrared light has been filtered out.

The cold color light source is the light source with a relatively low color temperature, 5000K and 6500K high color temperature, and 4000K is the cold white light, that is, the cold color light source.