您好,欢迎浏览中特保(天津)国际安保股份有限公司

新闻动态

保安公司选择红外灯的六大因素

来源:http://www.tjzhongtebao.com  发布时间:2018-09-11
人们在挑选红外灯的时候,一定要全面的考虑一下,天津保安公司这有挑选红外灯的六大要素,大家可以看看。
People in the selection of infrared lights, we must consider comprehensively, Tianjin Security Company this selection of infrared lights six elements, you can see.
1、摄像机给出的最低照度。这儿的最低照度概念是什么?摄像机发生的视频信号标称值为1V,规范值为0.7V,而最低照度时的视频信号值为1/3-1/2规范植。所以摄像机在最低照度时的图画,决不会“好像白昼相同”。
1, the minimum illumination given by the camera. What is the lowest illumination concept here? The nominal value of the video signal produced by the camera is 1V, the normative value is 0.7V, and the minimum illumination video signal value is 1/3-1/2 normative planting. So the picture of the camera at the lowest illumination will never "be the same as day."
2、摄像机在最低照度时发生的图画明晰度,是用电视信号测试卡进行测式的,其黑白相间的条纹,要求黑色反射率近于0%,白色反射率大于89.9%。而咱们在现场调查时有时不具备这样的条件,比方:树叶和草地的反射率很低,反差很小,就不易取得明晰图画。
2. The clarity of the picture when the camera is in the lowest illumination is measured by the television signal test card. The black and white stripes require the black reflectivity to be close to 0% and the white reflectivity to be greater than 89.9%. Sometimes we don't have such conditions in the field investigation, for example: the reflectivity of leaves and grasslands is very low, the contrast is very small, it is difficult to obtain clear pictures.
天津保安公司加盟
3、给出摄像机最低照度的一起,还要给出光圈F的要求值,而变焦镜头一般只给出1:F的最大值,即光圈F的最小值(光圈实践尺度最大值),F=f/D,那么D为定值,在f焦距拉大10倍时,F变得很大(即光圈实践尺度变得很小)。光通量将遭到很大影响。
3. Given the minimum illumination of the camera, the required value of aperture F is also given. The zoom lens generally gives the maximum of 1:F, i.e. the minimum of aperture F (the maximum of aperture practical scale), F = f/D. Then D is a fixed value, and F becomes very large when the f focal length is 10 times larger (that is, the aperture practical scale becomes very small). Luminous flux will be greatly affected.
4、在运用主动光圈镜头、主动增益控制或主动电子快门摄像机时,镜头光圈F值也会发生变化。例如,在摄像机近处有景象,反射回强光给摄像机,或附近有灯火照耀摄像机,这时摄像机的灵敏度将减小、主动光圈的尺度将被关小,光通量也将遭到很大影响。
4. The F-value of lens aperture will change when active aperture lens, active gain control or active electronic shutter camera are used. For example, when there is a scene near the camera, the reflected light returns to the camera, or a nearby light illuminates the camera, the sensitivity of the camera will be reduced, the scale of the active aperture will be turned off, and the luminous flux will be greatly affected.
5、防护罩对红外灯的作用也有影响,红外光在传输过程中,经过不同介质,透射率和反射率也不同。不同的视窗玻璃,,特别是主动除霜镀膜玻璃,对红外光的衰减也不同。
5. The shield also has an effect on the function of the infrared lamp. During the transmission of the infrared light, the transmittance and reflectivity are different through different media. Different window glass, especially the active defrosting coated glass, also has different attenuation to the infrared light.
6、有的器件出产或销售商,不给出红外灯的辐照间隔,只给出功率数,这样对出产、销售商来说费事可能少一些,可是这是非常迷糊的概念,由于功率耗费除转化为红外光能外,还有电源热损耗、电路热损耗、光源热损耗、滤光玻璃片红外光功率等等。相同功率的红外灯,其辐照间隔可能相差很远。
6. Some device producers or sellers do not give the irradiation interval of the infrared lamp, only give the number of power, which may be less trouble for the production and sellers, but this is a very confusing concept, because power consumption in addition to the conversion of infrared light energy, there are power loss, circuit loss, light source loss, filter. Optical glass, infrared power and so on. The radiation interval of the same power infrared lamp may vary widely.
跟着红外夜视体系的迅速发展,红外灯出产供给厂家也会添加,但红灯产品并非象有的人幻想的那样简单,在技能、检测仪器设备等方面条件也不同,期望用户多多加比较,稳重挑选。
With the rapid development of infrared night vision system, infrared lamp manufacturers will also add, but the red light products are not as simple as some people imagine, in terms of skills, testing equipment and other conditions are different, expect users to compare more, select steadily.
以上就是关于选择红外灯的六大因素的介绍,你了解了吗啊?想要了解更多的相关资讯,可以浏览我们的网站:http://www.tjzhongtebao.com
The above is the introduction of the six major factors of choosing the infrared lamp. Do you understand? For more information, you can browse our website, http://www.tjzhongtebao.com.

上一篇:保安公司具有良好的职业操守
下一篇:保安公司的常见装备有哪些?