What is IRCUT?

The IR-CUT dual filter refers to the built-in set of filters in the camera lens group. When the infrared sensing point outside the lens detects changes in the intensity of light, the built-in IR-CUT automatic switching filter can automatically switch according to the intensity of external light, achieving the best image effect. That is to say, during the day or night, the dual filter can automatically switch between filters, so the best imaging effect can be achieved regardless of whether it is during the day or night.

In the field of surveillance cameras: filtering infrared rays to cut off or pass through, commonly known as a dual filter switch.

The Effect of IR-CUT Dual Filter Switch on Cameras.

Fixed daytime color deviation issue and increased night brightness.

The principle of IR-CUT dual filter switch.

The IR-CUT dual filter switcher is composed of a filter (an infrared cut-off or absorption filter and a fully transparent spectral filter)+a power part (which can be an electromagnetic, electric, or other power source).

There are various wavelengths of light in nature, and the wavelength range for human eyes to recognize light is between 320nm-760nm. Light beyond 320nm-760nm cannot be seen by the human eye, such as infrared light, ultraviolet light, etc

The IR-CUT dual filter switcher works when the daytime light is sufficient, and the infrared cut-off filter returns the true color to the CCD. When the nighttime light is insufficient, the infrared cut-off/absorption filter automatically moves away, and the full transmittance spectral filter begins to work, allowing the CCD to fully utilize all the light, greatly improving low light performance.

什么是IRCUT?

IR-CUT双滤镜是指在摄像头镜头组里内置了一组滤镜，当镜头外的红外感应点侦测到光线的强弱变化后，内置的IR-CUT自动切换滤镜能够根据外部光线的强弱随之自动切换，使图像达到最佳效果。

也就是说，在白天或黑夜下，双滤光片能够自动切换滤镜，因此不论是在白天还是黑夜下，都能得到最佳成像效果。

监控摄像机领域：过滤红外线，让其截止或通过，形象称其：双滤光片切换器

IR-CUT双滤光片切换器对于摄像机的作用：修正白天偏色问题，提升夜晚亮度。

IR-CUT双滤光片切换器的原理：

IR-CUT双滤光片切换器是由滤光片（一片红外截止或吸收滤光片和一片全透光谱滤光片） + 动力部分（可以是电磁、电机或其他动力源）构成。

自然界存在着各种波长的光线，人眼识别光线的波长范围在320nm-760nm之间， 超过320nm-760nm的光线人眼就无法见到，比如红外光、紫外线等

IR-CUT双滤光片切换器在白天的光线充分时,红外截止滤光片工作，CCD还原出真实彩色，当夜间光线不足时，红外截止/吸收滤光片自动移开，全透光谱滤光片开始工作，使CCD充分利用到所有光线，

从而大大提高了低照性能。

What is Holder?

Holders with filters do not have switching function, but they also have infrared filtering function. The effect of maintaining color balance during the day or night. Holders are more used to match day and night full color starlight lenses. The price is good , which better reduces assembly costs.

带有滤光片的持有者，并不具备切换功能，但是也具备过滤红外线功能。使白天或者晚上不偏色的效果。持有者更多用于搭配日夜全彩的星光镜头。星光底座价格便宜，更好的降低组装成本。

Which one is better to choose?

The effect is actually similar. 

If you want your camera to have dual light source functionality, please choose to use IRCUT. 

If you want your camera to be brighter and clearer at night, you can choose IRCUT. 

If you value your assembly cost more and the camera does not have very high requirements and does not require its switching function, 

you can choose Holder. 

Starlight lenses have more options for Holders.

效果其实差不多。如果你想要你的摄像机具备双光源功能，请选择使用IRCUT。如果你想让你的摄像机夜晚更亮，更清晰可以选择IRCUT。如果你更重视你的组装成本，并且摄像机没有非常高的要求，不需要其切换功能，你可以选择Holder.星光镜头更多选择Holder。

If you need lenses and IRCUT, please contact me. We are the SECULENS CCTV.LENS and IRCUT Factory. Good price support!