First of all, the use of the two is different:
In a monitoring environment that does not require infrared light supplements, a common lens can be used; in a monitoring environment with infrared light supplementary light, an infrared lens must be used to achieve a better imaging effect; of course, an ordinary lens is used to supplement the infrared You can also see the picture under the light, but the picture will become blurry. I believe everyone has a deep understanding of this.
Secondly, the prices of the two are different:
The price of a professional infrared lens is several times that of an ordinary lens. Because the image of the infrared lens is relatively clear at night and in the morning, the effect is naturally expensive.
The reason why the two functions and prices are so different:
Because the refractive index of glass for different wavelengths of light is different, the position of the focus point will be different. At present, ordinary lenses on the market can gather light with a wavelength difference of about 250nm into the same three-dimensional, that is, 430~650nm or 650~ The light in the range of 900nm can be successfully focused to present a clear image, which is why the ordinary lens is clear in the daytime, and the night vision is blurred. Perhaps the night vision is clear and the daytime is blurred.
The professional-sensing infrared lens uses special lenses, which can gather light in the 430~900nm or even longer wavelength range into the same stereo, so both daytime and night vision are clear. Due to the special lens material, the cost is naturally high.
