The difference between HD surveillance camera and ordinary surveillance camera

We often see the manufacturers in the security market to promote the camera is high-definition, but the difference between the high-definition surveillance camera and the ordinary surveillance camera, is there any difference? The following is a small series of popular security nets for everyone to compare the difference between the two.

The HD surveillance camera refers to the HD1080P or HD720P camera, while the 1080P is called Full HD.

Difference in spectral correction ability

Only the transmission capability of wide spectrum is far from enough for high-definition imaging. If the spectral correction ability of the lens is insufficient, it will cause some wavelengths of light to be not accurately imaged on the target surface of the camera, resulting in the creation of a virtual image. This technique is not possible with ordinary lenses through coating.

Different spectral transmission capabilities

The spectral transmission capability of the lens also contributes to the improvement of picture clarity. The transmission of wide frequency light will greatly increase the amount of light received by the camera's target surface. It enhances the contrast and brightness of the picture and enriches the details of the picture.

Different clarity

The resolution of the lens at the center of the imaging surface is the highest, and the image at the edge is relatively poor. Ordinary lens can reduce the sharpness of the edge while the central resolution can basically meet the definition. The overall resolution can meet the requirements of 440,000 pixels of ordinary cameras.

The megapixel lens uses aspherical lenses to reduce aberrations and achieve a miniaturized design while improving clarity relative to ordinary lenses. With special optical design techniques, high image resolution is achieved from the center of the image to the surrounding image. The high-contrast image is about 2.5 times more resolving than the conventional lens, ensuring high image quality even when the image is cut or enlarged.

Therefore, there are three factors that determine the clarity of the lens: 1. The grinding accuracy of the lens. The grinding precision of the lens is determined by the grinding equipment. At present, the difference between the domestic lens and the foreign lens is reflected in this point; 2. The material and purity of the lens. The less impurities of the lens, the less interference light it produces, the higher the picture clarity; 3. The precision of the coating of the lens. Precise control of the coating process is also one of the determinants of lens clarity.

The above is the difference between high-definition surveillance cameras and ordinary surveillance cameras. For more information about surveillance cameras, please continue to pay attention to the hot security investment network.