Skip to content
Lasers are divided into 4 classes according to power

Lasers are divided into 4 classes according to power

The safety level of the laser is classified according to the degree of damage to the human body caused by the laser produced by the laser. LASERS ARE CLASSIFIED FROM CLASS I (NON-DAMAGING) TO CLASS IV LASERS.
Class <Class I> lasers are low-energy laser machines that are very safe and avoid all electrostatic hazards and are free of biological hazards. Here are just a few of the applications of CLASS I lasers: laser printers, CD players, CD ROM equipment, geological survey equipment, and experimental analysis equipment. CLASS I LASERS DO NOT CAUSE DAMAGE TO THE HUMAN BODY OR SKIN UNDER ANY CONDITIONS. When using a CLASS I laser, no additional safety equipment is required.
CLASS <CLASS II> LASERS ARE ALSO LOW-ENERGY LASERS (< 1 MILLIWATT POWER), BUT THEY CAN DAMAGE THE HUMAN EYE. Some examples of applications for Class II lasers include laser pointers, sighting devices, and some distance measurement devices. AVOID LOOKING DIRECTLY AT THE CLASS II LASER, AND ALSO DO NOT AIM THE CLASS II LASER AT ANYONE'S EYES. IN ADDITION, YOU SHOULD AVOID LOOKING AT CLASS II LASERS WITH TELESCOPES. IN FACT, IF A CLASS II LASER IS SHINING INTO YOUR EYES, YOU SHOULD IMMEDIATELY TURN YOUR HEAD TO THE SIDE OR CLOSE YOUR EYES IMMEDIATELY TO PREVENT LASER DAMAGE.
CLASS A LASER <CLASS IIIA> IS A STRONG LASER, WHICH IS A CONTINUOUS LASER WAVE, WHICH BELONGS TO A MEDIUM-ENERGY EMITTING DEVICE, AND THE SCATTERING OF LIGHT IS HARMFUL TO THE HUMAN BODY. Products equipped with Class IIIA lasers are located at an open area of 1000 m (3300 ft). Different countries have different regulations on the use of laser products, and at present, many foreign countries do not allow tertiary laser products to be used in cities, and diffuse scattering blocking materials are used to block the laser beam from passing through the restricted area (harmful distance*), and the laser beam must be stopped when people are active. Generally, it refers to the power of 1-5mW
CLASS CLASS LASER <CLASS IIIB> LASERS ARE MEDIUM-POWER LASERS. Not only is direct vision prohibited, but the scattered laser light can also cause damage to the human body. Whenever you operate in the laser control area, you must wear an isolation suit and a special protective eye shield. It is forbidden to use it in areas where there is human activity. Generally, it refers to the power of 5-500mW
Class IV > lasers are high-power lasers < class. The following are examples of the use of Class IV lasers, cutting, welding, and fiber machining. Class IV lasers are very dangerous and can cause fires. Generally, it refers to the power > 500mW

Latest Posts

Add on optional description for this section

    and Prospects Beam synthesis of high-power fiber lasers High-Power Laser Pointer Synthesis: Progress High-Powered Beam Torches Laser Flashlights Portable Lighting Technology Safety Considerations Trends
Low-noise, fast-tuning light source for coherent Raman microscopy and stimulated Raman microscopy

Low-noise, fast-tuning light source for coherent Raman microscopy and stimulated Raman microscopy

fangyun DAI @

Optical imaging technology has become a widely used microscopic imaging technology with the characteristics of non-contact measurement, no damage to the sample, high spatiotemporal resolution and high detection sensitivity. The fluorescent labeled imaging method has the advantages of high acquisition sensitivity and a wide variety of fluorescent labels, and is widely used in the biomedical field. However, its application is limited by its interference and photobleaching. Based on infrared spectroscopy and Raman spectroscopy microscopy technology to detect the natural vibration frequency of sample molecules, biological samples do not need to be pre-labeled, and directly use the characteristic spectral signal as imaging contrast, which has the advantages of molecular feature selectivity, and it has been widely used in biomedical microscopy, such as live cell, tissue or DNA imaging. However, the molecular spectral signal intensity is weak, which limits the detection sensitivity, laser power and data acquisition. Coherent Anti-Stokes Raman Scattering (CARS), which is also based on molecular vibrational energy levels, is a third-order nonlinear optical process, which produces a strong stimulated resonance signal and a certain directionality, which makes the CARS signal collection more efficient.

    High-Powered Beam Torches Laser Flashlights Portable Lighting Technology Safety Considerations
Attenuation and shrinking beam simulation for beam quality measurement of high-power lasers

Attenuation and shrinking beam simulation for beam quality measurement of high-power lasers

fangyun DAI @

Beam quality factor is the main parameter to characterize the transverse pattern of high-power lasers, and in order to solve the problem that the current beam quality analyzer can only be used for beam quality evaluation of small-aperture and low-power lasers, the principle and simulation of attenuation and beam reduction technology for beam quality measurement of high-power lasers were studied. The simulation model of the attenuation and shrinking beam component is established, and the thermally induced aberrations of optical components under high-power laser are studied by using the finite element method, and it is concluded that when the peak-to-trough (PV) value of thermally induced aberrations is less than 82 nm, the influence on the beam quality factor is less than 5%. As the beam passes through the attenuation component, if debias occurs, the beam quality factor will be smaller. Based on the Zenic polynomial and the beam quality factor calculation model, the influence of the wavefront distortion of the beam shrinking component on the measurement is studied and analyzed, and it is seen through the Zemax simulation analysis that the influence on the beam quality factor measurement is less than 5% when the angle of view between the incident light and the center optical axis of the beam shrinking component is less than 7° during the assembly and adjustment.
    High-Powered Beam Torches Laser Flashlights Portable Lighting Technology Safety Considerations
Depth: Research progress of high-power semiconductor lasers

Depth: Research progress of high-power semiconductor lasers

HighPowerLaser @

Laser is another major invention of mankind since the 20th century, after atomic energy, electronic computers, and semiconductors. Semiconductor laser science and technology takes semiconductor laser devices as the core, covering the study of the law, generation method, device technology, control means and application technology of stimulated radiation amplification of light, and the required knowledge integrates geometric optics, physical optics, semiconductor electronics, thermodynamics and other disciplines.

After more than 50 years of development, semiconductor laser, as a world-class research direction, has developed by leaps and bounds along with international scientific and technological progress, and has also benefited from breakthroughs in various related technologies, materials and processes. The progress of semiconductor laser has received great attention and attention in the international scope, not only in the field of basic science and continuous research and deepening, the level of science and technology continues to improve, but also in the field of application continues to expand and innovate, the application of technology and equipment emerge in an endless stream, the application level has also been greatly improved, in the national economic development of all countries in the world, especially in the fields of information, industry, medical and national defense has been an important application.

At present, the development of semiconductor lasers in the world is in a new stage of rapid development, and China's laser science and technology has basically maintained a trend of synchronous development with the world. From the perspective of comprehensive social development, industrial economic upgrading, national defense and security application and economic structure transformation, from the perspective of national competitive development, more clear needs are put forward for the comprehensive innovation of semiconductor laser technology and the transformation and development of industrial applications. In this paper, the development history and current situation of semiconductor lasers are reviewed, and the achievements of Changchun Institute of Optics, Fine Mechanics and Physics in recent years in high-power semiconductor lasers, especially in high-power semiconductor laser laser light sources, vertical cavity surface-emitting lasers and new laser chips.

Cart (0)

You're €90,00 away from FREE SHIPPING!

Your cart is currently empty

Wishlist

Recently Viewed