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Camera gun 4MM, 6MM refers to what?
- Monitor the camera said 4mm, 6mm is the size of the camera to monitor the camera, the smaller the number of mm mm, the larger the area of the monitor, the wider the angle, but the distance is not far, mm the greater the number of monitoring the farther away , But the monitoring of the angle will be a lot smaller, the specific parameters can refer to the following table, I was monitoring camera manufacturers, if you need a camera can contact me, the user name is my phone, hope my answer can make you satisfied, If you still do not understand the phone can be consulteds
The working principle of the camera with infrared light
- Infrared emission diode (IR LED) infrared lamp principle is: by the infrared light-emitting diode matrix composed of light. Infrared emission diode from the infrared radiation efficiency of high materials (commonly used gallium arsenide GaAs) made PN junction, plus forward bias voltage to the PN junction injection current excitation infrared light. Spectral power distribution for the central wavelength of 830 ~ 950nm, half-peak bandwidth of about 40nm or so, it is narrowband distribution, for ordinary CCD black and white camera can feel the range. The emission power of the infrared light emitting diode is expressed by the irradiance μW / m2. The maximum radiation intensity of the infrared diode is generally in front of the optical axis and decreases with the increase of the angle between the radiation direction and the optical axis. The radiation intensity is 50% of the maximum value of the angle is called the half intensity radiation angle, that is, half power angle. The radiation angle of the infrared light emitting diodes of different packaging process models is different.s
What is the camera's shooting range? How much is the diameter?
- Can you say what the next camera, mobile phone, computer, monitor, or what?s
Video surveillance video storage how to calculate the hard disk needs I use the 720P camera, to store 3 months of video, need to use the hard disk?
- 720p format (750p): 1280 × 720 (horizontal 720 lines, progressive scan), a resolution of 1280 × 720p / 60Hz, the frequency is 45kHz General: a day about 24G.s
How to remotely monitor the phone
- 1, the first network camera installed, connected through the network cable to the switch, the network camera connection is not the need for each network cable must be unified in a switch (such as: need to install a camera in the distance, if you want to install ten Camera so the traditional camera is necessary for each coaxial line must be inserted at the same time in a video recorder can be used normally, but the network camera can add a switch, that has ten network switches into a network only need to pull To another switch on the normal use, so do not have to spend a lot of trouble, save a lot of labor)s
Monitor the camera infrared light does not shine what is the reason
- Insufficient power supply Infrared light can not be activated (the screen will be black stripes)s
Camera clarity, 1080p. 3mp. 4k, what does it mean
- 3MP, 3 million pixels should be valid pixels or still photo pixelss
Monitor the camera in the monitor screen appears in the camera 001 what meaning
- One is the camera's own image on the name, you must enter the camera's menu, delete the name.s
How to mount floating shelves？
- Do you know how to mount floating shelves?Now let me tell you how to mount floating shelves .Floating shelves in a small space,it is a good idea to solve a lot of storage space, fo...
What is CCTV camera
- As the development of modern society, more and more people move into apartment community, for which safety has become a main concern for all residents. CCTV camera has become a nec...
How to hang shelves without nails？
- Do you know how to hang shelves without nails? Maybe you can hang shelves with nail,but if there are not nails,how to hang shelves without nails? The first solution about how to ha...
What Is Leather Image
- Different from fabric image, leather image is more special for its special material. As we know, leather is a durable and flexible material created by tanning animal rawhide and sk...
What is shelves？
- Ask you a very stupid question,do you know what is shelves？In our place, it refers to the instruments that people use to put books.The morphology and structure of it is different...