The security we are talking about here is security. It refers to theft prevention, intrusion prevention, fire prevention, and gas leakage prevention. The self-protection method of traditional houses is to install anti-theft doors, anti-theft window railings, etc., to make the house like a bird cage. Once a fire occurs, it becomes an obstacle to escape; otherwise, like a barracks, security goes around the clock. Do not know who is the thieves and who is the security guard. These are all passive defenses, and the most effective way to reduce the effectiveness of crime is to prevent it and prevent it from happening. If we can use the most advanced technological means and use high-tech products, the crime will be stopped at the initial stage and he will be given an alarm before he takes the next step, so that he can lose the time and opportunity for committing crimes and can satisfy people's safety. Preventing higher requirements is also a trend of security development in the future...
Below, we introduce some basic security products and related knowledge:
General security systems are usually composed of intrusion detectors, signal transmission channels, alarm controllers, and alarm centers.
Intrusion detector: An electronic device used to detect intruders, consisting of sensors and signal processors. The sensor converts external physical pressure, vibration, sound, and light into current, voltage, or resistance. The signal processor amplifies, filters, and integers the signals it outputs, making it an easy-to-transmit signal.
Channel: The medium used to transmit signals. Separate cable channels (twisted pair, telephone lines, cables, optical fibers) and wireless channels (signal transmitters, signal receivers).
Alarm controller: A device used to control whether an alarm is issued or not. The signal processor is composed of a signal processor and an alarm device (telephone, horn, and siren, etc.) to determine whether there is an intrusion signal or not, if there is an intrusion signal. , Automatically notify the alarm device to issue an alarm to warn the intruder.
Service Center: A department or agency that specializes in police affairs, such as: Property Management Center, Security Department, and 110.
Names and functions Uses and advantages and disadvantages: Door magnetic (access) switches Intrusion detectors, one mounted on a stationary door frame, or window frame, and the other installed on an active door leaf, or window sheet. When the doors and windows are closed, they are accessive, and if the doors and windows are opened and an open circuit is formed, an alarm is issued. Instead of products there are curtain-type infrared probes. Usually installed in doors, windows, counters or safes. Advantages: It does not limit the activities of indoor staff. It is suitable for night or only the elderly and children.
Active infrared intrusion detectors and laser intruder detectors emit a beam of infrared light or laser light, which is reflected or directly emitted to the receiver. If any one of them is interrupted to form a disconnected circuit, an alarm is issued. (Because infrared light and laser are invisible light sources, it has good concealment.) Similar products have buried electric field detectors for non-linear boundary protection, which is not limited by the shape of the ground surface and is not easily found. Strong. Usually used for perimeter prevention, such as fences, borders, etc.
The vibration of the vibrating sensor object (such as hammering the wall; the glass is broken) causes the detector to vibrate, triggering the detector to send an alarm signal. It is usually mounted on a wall that is to be protected, on glass or on wire mesh.
Acoustic Intrusion Detector Glass Breaking Acoustic Emission Detector can detect the sound of broken glass (frequency between 10kHz and 15kHz). The infrasound detector can detect the sound of chiseling walls and sawing steel bars (the frequency is between 1000 kHz and 3500 kHz). It is usually installed on the interior wall or ceiling.
Passive infrared, microwave detectors always produce infrared light. When there is infrared in the range controlled by the detector, the detector can detect and alarm. A microwave is a high-frequency (1mm to 1000mm) radio wave that is easily reflected by objects. The detector emits microwaves. If the object is stationary, then the reflected microwaves are unchanged; if there is an object moving, the reflected microwaves will change, triggering an alarm. In order to prevent false alarms, infrared and microwave are generally combined into one, which is called a binary infrared microwave detector. When the infrared is detected within the alert range, the microwave detector is automatically activated. Only when both the infrared and the microwave satisfy the alarm condition, can the alarm occur. It is usually installed on indoor corners (wall-mounted) or ceiling (ceiling). Infrared microwave detectors are the most commonly used detectors in security engineering.
Temperature alarm fire alarm device. When a fire occurs, an alarm is triggered when the temperature rises to a certain value due to the increase in room temperature.
Smoke detector fire alarm device, fire, smoke, when the smoke reaches a certain concentration, it will trigger an alarm.
Gas leak detector gas leak alarm device. The device detects the gas content of gas in the indoor air at any time, and triggers an alarm if it exceeds a certain concentration.
The alarm controller's device for processing alarm signals is an important part of the security system. If the detector is the human eye, then the alarm controller is the human mind. It should have anti-vandalism and anti-trimming capabilities, provide power for the detector it is connected to, and have a backup power supply for continuous operation for more than 24 hours. Manual or remote computer reset function. Note: It must be installed in a safe area that the detector can protect.
The control keyboard can control the entire information input device of the security system. Can be turned on, off; can arm, disarm and other settings. Note: It must be installed in a safe area that the detector can protect.
When the alarm sounds, it emits a high tone that can be used with a warning light or used alone.
Emergency button In any case, press the emergency button to send an alarm
Below, we introduce some basic security products and related knowledge:
General security systems are usually composed of intrusion detectors, signal transmission channels, alarm controllers, and alarm centers.
Intrusion detector: An electronic device used to detect intruders, consisting of sensors and signal processors. The sensor converts external physical pressure, vibration, sound, and light into current, voltage, or resistance. The signal processor amplifies, filters, and integers the signals it outputs, making it an easy-to-transmit signal.
Channel: The medium used to transmit signals. Separate cable channels (twisted pair, telephone lines, cables, optical fibers) and wireless channels (signal transmitters, signal receivers).
Alarm controller: A device used to control whether an alarm is issued or not. The signal processor is composed of a signal processor and an alarm device (telephone, horn, and siren, etc.) to determine whether there is an intrusion signal or not, if there is an intrusion signal. , Automatically notify the alarm device to issue an alarm to warn the intruder.
Service Center: A department or agency that specializes in police affairs, such as: Property Management Center, Security Department, and 110.
Names and functions Uses and advantages and disadvantages: Door magnetic (access) switches Intrusion detectors, one mounted on a stationary door frame, or window frame, and the other installed on an active door leaf, or window sheet. When the doors and windows are closed, they are accessive, and if the doors and windows are opened and an open circuit is formed, an alarm is issued. Instead of products there are curtain-type infrared probes. Usually installed in doors, windows, counters or safes. Advantages: It does not limit the activities of indoor staff. It is suitable for night or only the elderly and children.
Active infrared intrusion detectors and laser intruder detectors emit a beam of infrared light or laser light, which is reflected or directly emitted to the receiver. If any one of them is interrupted to form a disconnected circuit, an alarm is issued. (Because infrared light and laser are invisible light sources, it has good concealment.) Similar products have buried electric field detectors for non-linear boundary protection, which is not limited by the shape of the ground surface and is not easily found. Strong. Usually used for perimeter prevention, such as fences, borders, etc.
The vibration of the vibrating sensor object (such as hammering the wall; the glass is broken) causes the detector to vibrate, triggering the detector to send an alarm signal. It is usually mounted on a wall that is to be protected, on glass or on wire mesh.
Acoustic Intrusion Detector Glass Breaking Acoustic Emission Detector can detect the sound of broken glass (frequency between 10kHz and 15kHz). The infrasound detector can detect the sound of chiseling walls and sawing steel bars (the frequency is between 1000 kHz and 3500 kHz). It is usually installed on the interior wall or ceiling.
Passive infrared, microwave detectors always produce infrared light. When there is infrared in the range controlled by the detector, the detector can detect and alarm. A microwave is a high-frequency (1mm to 1000mm) radio wave that is easily reflected by objects. The detector emits microwaves. If the object is stationary, then the reflected microwaves are unchanged; if there is an object moving, the reflected microwaves will change, triggering an alarm. In order to prevent false alarms, infrared and microwave are generally combined into one, which is called a binary infrared microwave detector. When the infrared is detected within the alert range, the microwave detector is automatically activated. Only when both the infrared and the microwave satisfy the alarm condition, can the alarm occur. It is usually installed on indoor corners (wall-mounted) or ceiling (ceiling). Infrared microwave detectors are the most commonly used detectors in security engineering.
Temperature alarm fire alarm device. When a fire occurs, an alarm is triggered when the temperature rises to a certain value due to the increase in room temperature.
Smoke detector fire alarm device, fire, smoke, when the smoke reaches a certain concentration, it will trigger an alarm.
Gas leak detector gas leak alarm device. The device detects the gas content of gas in the indoor air at any time, and triggers an alarm if it exceeds a certain concentration.
The alarm controller's device for processing alarm signals is an important part of the security system. If the detector is the human eye, then the alarm controller is the human mind. It should have anti-vandalism and anti-trimming capabilities, provide power for the detector it is connected to, and have a backup power supply for continuous operation for more than 24 hours. Manual or remote computer reset function. Note: It must be installed in a safe area that the detector can protect.
The control keyboard can control the entire information input device of the security system. Can be turned on, off; can arm, disarm and other settings. Note: It must be installed in a safe area that the detector can protect.
When the alarm sounds, it emits a high tone that can be used with a warning light or used alone.
Emergency button In any case, press the emergency button to send an alarm
Reflective Concave Blazed Holographic Gratings
Concave Gratings are critical components in a variety of spectroscopic instrumentation.They are quite useful in analytical instruments,ranging from food analysis to plastics manufacturing and process quality assurance.They are also ideal for applications in optical communications,biotechnology, colorimetry,chromatography,and medical instrumentation.
China star optics can provide customers with a variety of replicated grating products such as diffraction gratings, reflective gratings,holographic gratings,concave gratings etc. to meet different needs. Maximum ruled area is up to 300x300mm2 for plane ruled diffraction gratings. For replicated diffraction and transmission gratings the ruling density can be from 20 grooves per millimeter to 2400 grooves per millimeter, wavelength from 0.2 micron to 25 microns.
Holographic gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-0.8um
Grooves per mm: 1,200 to 3,600L/mm
Diffraction: >70%
Ruled gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-15um
Grooves per mm: 50 to 2,400L/mm
Diffraction: >70%
Concave gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 200 to 900um
Grooves per mm: 490 to 1,200L/mm
Diffraction: >70%
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-0.8um
Grooves per mm: 1,200 to 3,600L/mm
Diffraction: >70%
Ruled gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-15um
Grooves per mm: 50 to 2,400L/mm
Diffraction: >70%
Concave gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 200 to 900um
Grooves per mm: 490 to 1,200L/mm
Diffraction: >70%
Concave Grating,1200 Lines/Mm Holographic Grating,Concave Fiberglass Grating,Platform Fiberglass Grating
China Star Optics Technology Co.,Ltd. , https://www.realpoooptics.com