How Do I Choose the Best IR Lasers?

Laser, originally called "Laser", "Laser" in Chinese, and LASER in English, which means "Light Amplification of Stimulated Radiation". The full English name of the laser (Light Amplification by Stimulated Emission of Radiation) has fully expressed the manufacturing laser In the whole process, in 1964, Qian Xuesen, a famous scientist in China, proposed to rename "light stimulated emission" to laser.

Laser infrared light

Laser, originally called "Laser", "Laser" in Chinese, and LASER in English, which means "Light Amplification of Stimulated Radiation". The full English name of the laser (Light Amplification by Stimulated Emission of Radiation) has fully expressed the manufacturing laser The whole process, famous in China in 1964

The laser infrared light cooperates with a sense infrared camera, a black and white CCD camera or a low-light night vision device to form a night vision monitoring system, which realizes continuous monitoring for 24 hours. The product has a long effective lighting distance, long service life, good night vision imaging effect, high concealment, and completely solves the problem of night vision lighting. It is the most ideal infrared lighting product for night vision monitoring.

Has been widely used in public security, justice, banking, prisons, oil fields, engineering construction, forestry, maritime, customs, ports, railways, airports, border defense, military, roads, factories, communities, squares, warehouses and other night vision monitoring places.

6 development trends of laser infrared lamps

With the technological progress and development of laser infrared lamps, laser infrared lamps as the night vision supplementary light source for cameras are more and more in line with market requirements, replacing LED infrared lamps as the best matching infrared light source products for medium and long distance. Seeing that the laser infrared technology is an advanced infrared technology that is different from the essence of LED, and has subsequently become the leading product and market of infrared technology. Some domestic front-end equipment is invested in the development of laser infrared lamps and their own products. With a keen market vision, it seizes market opportunities to meet demand, at the same time can occupy market leadership, occupy the highest end of technology, and meet the company's innovative profit orientation.

The development and application of laser infrared lamp technology has an irreversible trend in the security industry, creating another space for night vision monitoring; the field. There are always skeptical attitudes towards new technologies, and some people and enterprises that maintain an attitude of acceptance. Independent innovation is the core competitiveness of enterprises, and infrared laser night vision technology caters to and integrates the development direction of infrared technology of enterprises. Whoever grasps this direction will master the commanding heights of the market, thus winning customers' recognition of the company's strength and innovation ability, and thus winning the market's previous period of profits and market control and possession. With the development of laser infrared technology and market recognition, it remains to be seen whether laser infrared lamps will become recognized by the market and whether laser infrared lamps will become the mainstream infrared night vision products in the market.

A Directivity: The light emitted by the laser is emitted in one direction, and the divergence angle of the beam is small, which is close to the ideal parallel light.

B Monochrome: The spectral width of the laser is very small, on the order of several nanometers. So it has a good monochromatic light source.

C. High brightness and high energy density.

2.A brief description of semiconductor lasers

Lasers include solid-state lasers (such as ruby lasers. Converting light energy into light energy with different wavelengths), gas lasers (such as carbon dioxide lasers), chemical lasers (chemical energy into light energy), and semiconductor lasers (electric energy into light energy) .

Laser infrared lamp belongs to semiconductor laser. It is formed by using semiconductor materials to reduce the energy level of electrons during the recombination of holes and electrons to release photons to generate light energy. Then the photons generate resonance in the resonant cavity to regulate the direction of photon propagation. laser.

The size of the semiconductor laser is small, the size of the laser is on the order of millimeters, and the light emitting chip is on the order of hundreds of microns;

Semiconductor lasers have a high conversion efficiency from electrical energy to optical energy, with an electro-optical conversion efficiency of at least 80%, and LED lamps have an electro-optical conversion rate of up to 20%.

3.Laser infrared lamp The laser infrared lamp uses a semiconductor laser as the light emitting device.

The semiconductor laser outputs light, so it can be used as a light source for illumination. And because the laser has good directivity, it shows that the angle of the beam is small, the energy is concentrated, and there is still enough light intensity to travel to a long distance, so it is very suitable for long-distance lighting. The ability to illuminate long-distance targets is the biggest feature of infrared laser illuminators.

The energy of a semiconductor laser is uneven in the vertical cross-section of the beam, with a Gaussian distribution, strong in the middle, gradually weakening to the edges, or light and dark stripes. Therefore, it is not advisable to directly use a semiconductor laser as the lighting source effect (the manufacturer of non-professional laser lights on the market, the copycat laser infrared lamp has many problems, which makes engineering users have some negative impressions on the laser infrared lamp).

Night vision monitoring system composed of laser infrared light + ordinary CCD camera; the product uses infrared semiconductor laser with a wavelength of 810nm as the light source, and cooperates with infrared camera, black and white CCD camera or low-light night vision equipment to form an infrared night vision monitoring system, which is an active Night vision surveillance system. The laser infrared lamp is the active light source equipped. Compared with low-light night vision and infrared camera, it has better market adaptability.

Laser infrared lamps usually use 810nm semiconductor lasers. 810nm belongs to the near infrared, which is close to the wavelength of red light in visible light. The CCD has a better sensing of the 810nm wavelength. The induction chips of various regular manufacturers have a strong induction effect on the spectrum of 810NM.

However, when a camera is made, in order to ensure the color image quality, near-infrared light is filtered out before entering the CCD. Generally, manufacturers use filters to filter infrared light. When not filtered, the color image will have a serious color cast.

4 Differences between laser illuminators and LED lights

1. Illumination distance: The output power of a single LED is generally 5 ~ 15W. Although 40 ~ 50W LED products have come out, it is still unable to compare with the semiconductor laser tube (LD). Up to 10W, the brightness of a laser tube is equal to the sum of the brightness of several hundred LEDs. Therefore, relatively small laser products can reach a large irradiation distance, greatly improving the irradiation effect and increasing the brightness of the screen.

2. Volume: The infrared laser illuminator uses a single-chip semiconductor laser tube as the light-emitting medium, so the volume can be made small, and at the same time, it can meet the requirements of brightness.

3. Lifetime: Both semiconductor laser tubes and LEDs are semiconductor light-emitting products. The lifespan of semiconductor products is largely restricted by the heat dissipation of the products. Because the laser illuminator uses a metal package and a dedicated power supply, we use advanced semiconductor temperature control technology to achieve perfect temperature control, so that the product always works at a set reasonable temperature, and the life can be well guaranteed.

4. Red exposure: Near-infrared semiconductor light emitting products have red exposure problems, which is determined by the semiconductor light emitting mechanism. However, because the infrared laser illuminator uses a single chip to emit light, the existence of red exposure has only a small light emitting point, which can even be ignored in long-distance lighting. The LED lamp is assembled by many LED tubes. After the red exposure occurs, the entire panel of the product will be red exposed, which is not conducive to the concealment of the infrared lamp.

5. Cost: The production methods of semiconductor laser tubes and LEDs are very similar. The core chips are realized by epitaxial growth, and then different packaging processes are used to meet the chip's working requirements. The cost difference is mainly determined by the production volume of the product. Due to the simple packaging and huge application volume, LED can be produced on a large scale, which greatly reduces the product cost. With the continuous development of laser application technology, the output of semiconductor laser tubes Over the years, it has also increased geometrically. The cost of the product has dropped to a stage that can be afforded by ordinary users.

6. Due to the high working conditions of semiconductor laser tubes, the quality requirements of each laser tube are much higher than those of LEDs. Therefore, the quality of the core components of infrared laser illuminators has strict requirements from the beginning, and the quality control is high. Requirements to guarantee the performance and quality of the final product

With the development of the security industry, 24-hour uninterrupted monitoring is increasingly demanding infrared night vision, which not only meets the requirements of tens of meters in close proximity, but with the emergence of new intelligent video technology in the security industry, network camera dynamics The monitoring requirements are also getting higher and higher. If an emergency occurs, a mesh camera is required for long-range tracking monitoring. The actual effect of LED infrared light products can only reach tens of meters. The infrared effect increases with distance and angle. And decay. It is impossible to complete the tracking and monitoring at medium and long distances. In the infrared lamp products that can realize the long-distance monitoring, the mesh camera with laser infrared lamp products is the best choice.

Laser infrared lights are gradually widely used in the field of monitoring night vision, but there are also some problems in the process of use, that is, there is a certain misunderstanding of the fundamental understanding and understanding of laser infrared lights and their use, so let's talk about it from the following angles Laser infrared lamp views, for your correct understanding and understanding of laser infrared lamp products.