With the widening of monitoring applications, hemispherical cameras have been widely used in indoor surveillance due to their advantages such as ease of installation and debugging, and concealment of surveillance. For example, there are applications where ceilings and light are not changed.
Frequently Asked Questions Question 1: Infrared dome camera color distortion, color cast
It may be that the white balance switch (AWB) is not set properly, or the ambient light conditions may be changed too much. At this time, check whether the switch setting is in the OFF position and you should think of ways to improve the ambient light conditions.
Second problem: infrared night vision dome camera image normal during the day, night, white <br> <br> This phenomenon is generally due to the machine using a reflective environment or in a very small range of space, because the infrared light reflection leads to solve this phenomenon First of all, we should determine whether there are reflective objects in the use environment, improve the use environment as much as possible, and then check whether the effective infrared distance of the machine is in accordance with the actual use distance; if a long-distance infrared machine is used in a very small space, it will be caused by excessive infrared light. The machine image is whitish.
Problem 3: Infrared half-camera series has poor image brightness, white or bright white aperture at night
It should be said that the phenomenon is caused by improper assembly of the machine. When the photosensitive device (photoresistor) is too far away from the infrared hemisphere camera during assembly, it will cause the incomplete start of the infrared lamp to cause the night illumination of the machine to be poor; the phenomenon of white or bright white aperture appears. The infrared light emitted by the infrared light emitting tube is refracted by the dome cover to the lens. To solve this problem, it is necessary to avoid the infrared light refracting the lens surface. Usually, a sponge ring is used to isolate the lens from the infrared light. The ball cover must be tightly attached during assembly. Sponge ring.
Question 4: There are several black bars or bars on the screen. <br><br> This situation is generally the output voltage ripple of the machine power supply is too large, should strengthen the filter and use good performance DC regulated power supply.
Question 5: After the cause of waterproof and heat dissipation is not ideal <br> <br> with a long time, there will be more or less inside the camera soda (This phenomenon is mainly concentrated in the northern region), this phenomenon is mainly in the The sealing effect of the shell is not enough and the temperature difference is not taken into account when the fashion machine. When the infrared lamp starts to work, it will generate a lot of heat, and at the same time the heat dissipation effect of the shell is not enough, which will greatly reduce the service life of the camera. To solve this problem, the infrared hemisphere camera's shell can be made into a plurality of wire troughs. It is good for heat dissipation.
Question six: daytime color reproduction is not enough <br> <br> do not know if you have not noticed color infrared dome camera cast during the day will be more or less, the most direct reason is the problem of camera filters, general Infrared dome cameras use bimodal filters that transmit a certain proportion of infrared light. The advantage is that the cost is low, but natural light contains more infrared components. When it enters the CCD, it interferes with color reproduction. For example, green plants change. Gray and so on (especially outside the city with sunshine is particularly obvious). The use of the IRCUT dual filter effectively solves this problem. The IRCUT dual filter consists of an IR cut filter and a full spectrum optical glass. When the daylight is sufficient, the IR cut filter works, and the CCD is restored. With real colors, when the nighttime light is insufficient, the infrared cut filter automatically moves away, and the full-spectrum optical glass starts to work, making the CCD make full use of all the light, thereby greatly improving the infrared performance.
Seven questions: IR dome camera image <br> <br> no external power supply is first checked whether the correct polarity, whether the output voltage satisfies the requirements (power error: DC12V ± 10%, AC24V ± 5%), then check the video cable is in contact Good; if you use a manual iris lens to check the aperture is open, automatic aperture lens need to adjust the LEVEL potentiometer to make the aperture in the right place.
Question 8: The image quality of the infrared dome camera is not good . a. Check whether the lens is fingerprinted or dirty.
b. Check if the aperture is adjusted;
c. Check the video cable for poor contact;
d. Check if there is any problem with the electronic shutter or white balance setting.
e. Check if the transmission distance is too far;
f. Check the voltage is normal;
g. Check for nearby sources of interference;
h. Check that the elevator is insulated from the interference when installed in the elevator;
i. Check whether the CS interface is connected.
Nine on: IR Dome camera picture appears distorted or geometric distortion <br> <br> this phenomenon may be an infrared dome camera, the monitor geometry correction circuit has a problem or question optical lens, may also be connected to a cable or video device The characteristic impedance does not match the output impedance of the IR dome camera.
When the above phenomenon occurs, please check whether the optical lens used is abnormal and whether the monitor's input impedance switch is set to 75Ω, and then check whether the impedance of the video cable used is 75Ω.
Frequently Asked Questions Question 1: Infrared dome camera color distortion, color cast
It may be that the white balance switch (AWB) is not set properly, or the ambient light conditions may be changed too much. At this time, check whether the switch setting is in the OFF position and you should think of ways to improve the ambient light conditions.
Second problem: infrared night vision dome camera image normal during the day, night, white <br> <br> This phenomenon is generally due to the machine using a reflective environment or in a very small range of space, because the infrared light reflection leads to solve this phenomenon First of all, we should determine whether there are reflective objects in the use environment, improve the use environment as much as possible, and then check whether the effective infrared distance of the machine is in accordance with the actual use distance; if a long-distance infrared machine is used in a very small space, it will be caused by excessive infrared light. The machine image is whitish.
Problem 3: Infrared half-camera series has poor image brightness, white or bright white aperture at night
It should be said that the phenomenon is caused by improper assembly of the machine. When the photosensitive device (photoresistor) is too far away from the infrared hemisphere camera during assembly, it will cause the incomplete start of the infrared lamp to cause the night illumination of the machine to be poor; the phenomenon of white or bright white aperture appears. The infrared light emitted by the infrared light emitting tube is refracted by the dome cover to the lens. To solve this problem, it is necessary to avoid the infrared light refracting the lens surface. Usually, a sponge ring is used to isolate the lens from the infrared light. The ball cover must be tightly attached during assembly. Sponge ring.
Question 4: There are several black bars or bars on the screen. <br><br> This situation is generally the output voltage ripple of the machine power supply is too large, should strengthen the filter and use good performance DC regulated power supply.
Question 5: After the cause of waterproof and heat dissipation is not ideal <br> <br> with a long time, there will be more or less inside the camera soda (This phenomenon is mainly concentrated in the northern region), this phenomenon is mainly in the The sealing effect of the shell is not enough and the temperature difference is not taken into account when the fashion machine. When the infrared lamp starts to work, it will generate a lot of heat, and at the same time the heat dissipation effect of the shell is not enough, which will greatly reduce the service life of the camera. To solve this problem, the infrared hemisphere camera's shell can be made into a plurality of wire troughs. It is good for heat dissipation.
Question six: daytime color reproduction is not enough <br> <br> do not know if you have not noticed color infrared dome camera cast during the day will be more or less, the most direct reason is the problem of camera filters, general Infrared dome cameras use bimodal filters that transmit a certain proportion of infrared light. The advantage is that the cost is low, but natural light contains more infrared components. When it enters the CCD, it interferes with color reproduction. For example, green plants change. Gray and so on (especially outside the city with sunshine is particularly obvious). The use of the IRCUT dual filter effectively solves this problem. The IRCUT dual filter consists of an IR cut filter and a full spectrum optical glass. When the daylight is sufficient, the IR cut filter works, and the CCD is restored. With real colors, when the nighttime light is insufficient, the infrared cut filter automatically moves away, and the full-spectrum optical glass starts to work, making the CCD make full use of all the light, thereby greatly improving the infrared performance.
Seven questions: IR dome camera image <br> <br> no external power supply is first checked whether the correct polarity, whether the output voltage satisfies the requirements (power error: DC12V ± 10%, AC24V ± 5%), then check the video cable is in contact Good; if you use a manual iris lens to check the aperture is open, automatic aperture lens need to adjust the LEVEL potentiometer to make the aperture in the right place.
Question 8: The image quality of the infrared dome camera is not good . a. Check whether the lens is fingerprinted or dirty.
b. Check if the aperture is adjusted;
c. Check the video cable for poor contact;
d. Check if there is any problem with the electronic shutter or white balance setting.
e. Check if the transmission distance is too far;
f. Check the voltage is normal;
g. Check for nearby sources of interference;
h. Check that the elevator is insulated from the interference when installed in the elevator;
i. Check whether the CS interface is connected.
Nine on: IR Dome camera picture appears distorted or geometric distortion <br> <br> this phenomenon may be an infrared dome camera, the monitor geometry correction circuit has a problem or question optical lens, may also be connected to a cable or video device The characteristic impedance does not match the output impedance of the IR dome camera.
When the above phenomenon occurs, please check whether the optical lens used is abnormal and whether the monitor's input impedance switch is set to 75Ω, and then check whether the impedance of the video cable used is 75Ω.
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