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Waveplate, also known as phase retarder, is an optical element that changes the polarization state of light by generating an optical path difference (or phase difference) between two mutually orthogonal polarization components. When the incident light passes through different types of parameter wave plates, the outgoing light is different, which can be linearly polarized light, elliptically polarized light, circularly polarized light, etc. The main materials of wave plates are birefringent crystals such as quartz, mica, and calcite. Bohr optics can provide cemented zero-order 1/2 retardation waveplate, cemented zero-order 1/4 retardation waveplate, multi-order 1/2 retardation waveplate, multi-order 1/4 retardation waveplate, etc. Compound Zero-Order Waveplate, also known as compound waveplate, is to glue two multi-stage waveplates together to eliminate the full-wave optical path difference by aligning the fast axis of one waveplate and the slow axis of the other waveplate. Leave the required optical path difference. Gluing the zero-order waveplate can improve the effect of temperature on the waveplate, but it also increases the sensitivity of the retardation of the waveplate to the incident angle and wavelength. The thickness of the Multiple-Order Waveplate is equal to the multiple full wave thickness plus a desired retardation thickness. Multistage waveplates are easy to manufacture, but are sensitive to wavelength, temperature, and incident angle.

The traditional concept of applied optics refers to the theory and design of optical systems through optical instruments (telescopes, microscopes, cameras, projectors), and its contents are mainly geometric optics and wave optics. With the rapid development of optical disciplines, such as the emergence of laser and its wide application, the development of optical fiber communication and optoelectronic imaging technology, and the combination of optics and computer technology, optical instruments have undergone a huge transformation from traditional to modern. The connotation of applied optics, which is the basis of optical engineering, is also expanding, and it is gradually covering the basic content of some modern optics. It is composed of many sub-disciplines closely related to physics; because it has a wide range of applications, there are also a series of sub-disciplines with strong application backgrounds that also belong to the scope of optics. For example, photometry and radiometry related to the measurement of physical quantities of electromagnetic radiation; colorimetry to study the color vision caused by electromagnetic radiation and the measurement of psychophysical quantities with the normal average human eye as a receiver; and many Technical optics: optical system design and optical instrument theory, optical manufacturing and optical testing, interferometry, thin film optics, fiber optics and integrated optics, etc.; there are also branches that intersect with other disciplines, such as astronomical optics, ocean optics, remote sensing optics, Atmospheric optics, physiological optics and weapon optics, etc.

Optical lenses made of curved glass or other transparent materials can magnify objects for imaging. Optical microscopes use this principle to magnify tiny objects to a size sufficient for human eyes to observe. Modern optical microscopes usually use two levels of magnification, which are completed by the objective lens and the eyepiece respectively. The object to be observed is located in front of the objective lens, and is magnified by the objective lens in the first stage to form an inverted real image, and then the real image is magnified by the eyepiece in the second stage to form a virtual image, and what the human eye sees is the virtual image. The total magnification of a microscope is the product of the magnification of the objective lens and the magnification of the eyepiece. Magnification refers to the magnification ratio of linear dimensions, not the area ratio.

Laser lens includes laser spherical lens, laser aspherical lens, laser cylindrical lens, etc. In the laser optical system, they play the role of converging light and laser beam shaping. Bohr optics has launched a high-power laser plano-convex lens (Laser Plano Convex Lens) with an incident angle of 0° and designed for lasers with wavelengths of 355nm, 532nm, and 1064nm. This type of laser plano-convex lens uses Corning 7980 material as the substrate, and It has the characteristics of high transmittance, low absorption, high laser damage threshold, high surface quality, etc., and can be widely used in laser marking, laser welding, laser micromachining, education and scientific research and other related fields. Bohr optics has complete manufacturing and testing equipment, which can provide you with high-quality laser lenses. Bohr optics is a professional optical component supplier in China, which can provide you with a variety of standard and non-standard optical components to meet your various needs. If you have any questions or needs, you can contact us, we will serve you wholeheartedly.

Plano Convex (PCX) Lenses focus parallel rays into a point, which is the focal point of the lens. Its characteristic is that the focal length is positive, one side is flat, and the other side is convex. When using, the convex surface is usually facing the incident light, because the light incident on both sides of the plano-convex lens has a slight difference in refractive index, so the focal lengths of the two sides are also different. In order to reduce spherical aberration, the beam should be incident from the curved surface as much as possible. Plano-convex lenses are often used for aiming and focusing monochromatic light sources, converging parallel light, or converting divergent point light sources into parallel light. Bohr optics provides uncoated and AR-coated plano-convex lenses to meet your different applications in various wavelengths. Anti-reflection coating options include UV, VIS, NIR, and SWIR, which are double-sided coatings, which can greatly reduce light reflection on the surface of components and increase the transmittance of plano-convex lenses. Bohr optics provides plano-convex lenses of various materials. Among them, K9 optical glass substrates are suitable for visible light and near-infrared applications, germanium, silicon, zinc selenide, calcium fluoride and other substrates are suitable for infrared applications. Suitable for UV light band applications.

Unlike spherical lenses, aspheric lenses have a constant radius of curvature. The radius of curvature of aspheric lenses changes continuously from the middle to the edge with the change of the main optical axis, which can better correct spherical aberration and chromatic aberration, and then Improve the spot quality of the lens. By adjusting the conic constant and aspheric coefficient, the lens is optimized to minimize aberrations, and it is often used in barcode scanning, laser alignment, optical imaging and other fields. Aspheric lenses use a single-element design to help minimize the number of lenses in an optical system. Aspheric lenses allow optical component designers to correct aberrations using a smaller number of optical elements than traditional spherical elements because the former is They provide more aberration correction than the latter can provide using multiple surfaces. Bohr optics offers uncoated and AR coated aspherical lenses. AR coating options include UVA, VIS, NIR, SWIR, IR1, IR2. Bohr optics provides aspherical lenses of various materials. Among them, zinc selenide material is suitable for infrared band applications, molded optical glass is suitable for cost-effective mass production, and TPX material is suitable for terahertz band applications.

1. According to the purpose of use, filters can be divided into TIRF filters, interference filters, total internal reflection filters, Raman filters, Raman filters, FISH fluorescence filters and allergens Bit hybridization filter. 2. According to the different functions of the filter itself, it can be divided into excitation filter, emission filter, dichroic mirror/dichroic filter/dichroic mirror, notch filter, fuel filter filter, fluorescein filter, ND filter, neutral filter, neutral grayscale filter, cut-off filter, high-pass filter, low-pass filter, band-pass filter, UV filter and UV filters. 3. According to the main application fields, filters can be divided into biological filters, medical filters and astronomical filters. 4. Filters refer to various fluorescence filters, which are generally used in various microscopes, enabling people to observe various fluorescence phenomena more conveniently.

Whether welding or surface structuring, lasers are now an integral part of many industrial processes. It still has great potential for future applications. Lasers reliably cut and weld body panels and transmission components in the automotive industry. They use laser cladding welding to repair turbine blades in the aerospace industry and use the laser powder bed fusion process to produce custom and lightweight components for the aerospace industry. Short-pulse lasers, through their ability to drill, cut or construct, make a huge contribution to the miniaturization of new devices in the electronics industry. To sum it up: the laser is an all-around tool that has established itself in numerous industries.

Spherical lens, the shape of the sphere corresponds to the section of the sphere, and the sphere is a rotationally symmetric optical element whose radius of curvature does not change the distance from the geometric center. This means that the optically effective area can be described by specifying only one parameter, the radius R. Since this parameter is constant over the entire surface, the sphere has a relatively economical cost advantage in manufacturing. In terms of production cost, spherical lenses have obvious advantages. This is due to the uniform shape of the sphere ensuring a simple manufacturing process and shorter production times. Spherical lenses are suitable for fast generation of aspects of optical inspection and uniform measurement. For example, tactile measurement methods (such as profilometers or 3D coordinate measuring machines), as well as optical measurement methods (such as interferometers and computer-generated holograms (CGH)) are selected for measurement using spherical lenses. Spherical lenses have a wide range of applications, such as metrology, aerospace (spectrometers mounted inside satellites) or medical technology (slit lamps for examining the anterior segment). Used to refract incident light to the desired degree depending on the shape, scattering or focusing properties of spherical lenses. In imaging systems, where high image quality is accompanied by low imaging errors, spherical aberration can also be reduced by selecting the effective aperture, which is caused by blocking other incident rays with stronger peripheral light intensity. In addition, the use of multiple spherical lenses can also improve image quality, but the spatial conditions of the optical system must be considered. Achromatic can be achieved by combining one or more condenser and dispersive lenses, usually using a low-refractive-index positive convex lens and a low-refractive-index negative concave lens and cementing them together to improve spherical aberration and chromatic aberration in optical systems such as achromatic Chromatic aberration mirrors are used in photographic lenses.

A narrowband filter is a filter with a relatively narrow bandwidth, named after BP, and the wavelength position with a relatively large transmission value is used as their serial number. Half of the larger transmittance of the narrowband filter corresponds to the half width, the short-wave cut-off wavelength is on the short-wave side of the peak, and the transmittance is equal to zero, and the long-wave cut-off wavelength is on the long-wave side of the peak, and the transmission is equal to zero wavelengths. The narrow-band optical filter produced by Anshan Jiet Optoelectronics has high transmittance, low optical signal attenuation rate, effectively improving working distance and light intensity; high cut-off depth, effectively avoiding stray light interference; high wavelength accuracy; advanced coating machine production, IAD Ion-assisted coating technology ensures low temperature drift and stronger film firmness. The function of the narrow-band filter is only to allow light in a certain wavelength range to pass, while the light of other wavelengths cannot pass. Various digital and electronic product windows, solar cells, IC packaging, etc. can be used to reduce the influence of variegated light or light pollution, measure the surface temperature of stars, separate color exposure to eliminate the influence of chromatic aberration, and reduce the impact of the sun, moon, Mars, etc. Brightness gets clearer details, can prevent infrared, ultraviolet exposure to CCD or damage to the eyes and so on. At the same time, narrow-band filters are also widely used in photographic creation, printing plate making, color photography and magnification, and various technical photography. Especially in black and white photography, it can have three functions of passing, limiting and blocking all kinds of color light. If it is blocked, the color tone is all black, so in black and white photography, the narrow-band filter actually plays the role of correcting the color contrast of the object, so that the color of various objects becomes the contrast and the ideal tone.

Powell prism is an optical scribing prism, which enables the laser beam to be optimally scribed into a straight line with uniform optical density, good stability and good linearity after passing through. Powell prism scribing is superior to the scribing mode of cylindrical lenses, eliminating the central hot spot and faded edge distribution of Gaussian beams. When a Gaussian laser beam passes through an ordinary cylindrical lens, it will produce unevenly distributed straight lines, while the top of the Powell prism is a complex two-dimensional aspheric surface, and a large amount of spherical aberration will be generated when the laser passes through, redistributing the light path and reducing the central area. The light at the edge is increased to form a uniform straight line, which is suitable for various machine vision applications such as biomedicine, automobile assembly, and food processing.

The CO2 laser mirror is an important component in the laser light transmission system. CO2 Laser mirrors are optical elements that work using the law of reflection. Mirrors can be divided into three types: plane mirrors, spherical mirrors and aspheric mirrors according to their shapes. In the laser light path of medium and small power, the mirror can be used in two aspects. In the laser tube, the mirror can be used as a tail mirror. The mirror base has a certain curvature, which plays the role of oscillating the laser. In order to transmit the high beam energy of high-performance lasers in optical components, the requirements for CO2 laser mirror coating also put forward a relatively high requirement. For optical films with more than 17 layers, we generally use vapor deposition to process lasers in production. Reflector. The dielectric film materials used in laser mirrors are almost non-absorbing materials, and can reach a reflectivity of 99% in some specific wavelength ranges, such as BK7 glass, quartz series, single crystal silicon, molybdenum and other substrates. In the laser beam of medium and small power, quartz and glass substrates are mostly selected, and molybdenum and silicon are used as substrates at the same time. Wipe resistance, the disadvantage is low reflectivity. Silicon mirrors are currently the most used mirrors and have good optical thermal properties. The surface of the silicon mirror is plated with gold film to improve the reflectivity, and a protective film can also be added to the reflective film of the mirror to make the original lens more resistant to wiping and improve its service life.

Plano-concave cylindrical lens are often used to convert a collimated laser source into a line light source. Plano-concave cylindrical lens are often used in beam expander applications to change the height of the image without changing the width of the image. Compared with spherical lenses, cylindrical lenses Compared with lenses, cylindrical lenses are more difficult to manufacture.

The dome window is a protective window in the shape of a hemispherical shell, which is often used in applications with a wide angle range of incident light, such as detectors, optical sensors and other applications.

Bandpass filter is a filter which is adjacent to cut-off band on both sides of transmission band of spectral characteristic curve. Bandpass filter can be roughly divided into broadband filter and narrowband filter according to the spectral characteristics, two kinds of filter are usually combined, the application of light wave interference principle to prepare bandpass filter, and bandpass filter has been widely used in various fields. The filter with cut-off zone on both sides of transmission band of spectral characteristic curve is called band-pass filter. Bandpass filter is an important optical thin film element, which is widely used in chemistry, spectroscopy, laser, astrophysics, optical fiber communication, biology and other fields. In the spectral curve of band-pass filter prepared by the principle of light wave interference, the transmission region of the spectrum near the wavelength is called the passband of the filter, usually with cutoff region on both sides, and there may be bypass band around the cutoff region, usually need to use colored glass, absorption film or cut-off filter to eliminate the bypass band.

In modern life, prisms are widely used in digital equipment, science and technology, medical instruments and other fields. Commonly used digital equipment: cameras, CCTVs, projectors, digital cameras, digital camcorders, CCD lenses and various optical equipment; Science and technology: telescopes, microscopes, levels, fingerprints, gun sights, solar energy converters and various measuring instruments; Medical equipment: cystoscope, gastroscope and various laser treatment equipment.

A beam splitter prism is an optical element that divides a beam of light into two beams of light according to a certain ratio of reflection and transmission. In the usual laser optical system, illumination optical system, and spectrometer optical system, the beam splitter is a common optical component to divide the transmission and reflection percentage, the polarization state of the transmitted and reflected light

Optical system refers to a system composed of various optical elements such as lenses, mirrors, prisms and diaphragms in a certain order. Usually used for imaging or optical information processing. An optical system composed of two or more refracting (or reflecting) spherical surfaces with the center of curvature on the same line is called a coaxial spherical system, and the line where the center of curvature is located is called the optical axis. In addition to considering Gaussian optics related issues in an optical system, such as the conjugate position of the object image, magnification, image transfer and refraction optical path, etc., it also needs to consider the size of the imaging range, the size of the imaging beam aperture angle, the width of the imaging band, and A series of problems such as clarity and illumination. The actual optical system that meets a series of requirements is often not a simple combination of several lenses, but consists of a series of lenses, curved mirrors, plane mirrors, reflective prisms, and reticles and other optical parts. Means of finely correcting aberrations and properly dimensioning the lateral dimensions of the optical components are required to obtain the desired high quality system.

The use of aspheric optics is mainly due to their advantages over spherical optics. The biggest advantage is the correction of aberrations and the associated better imaging properties. Aspherical lenses are also used in zoom lenses. These not only reduce system size but also improve image quality compared to applications using spherical lenses. Aspheric lenses can be used to observe both stars and space. Aspheric optics included in its spectrometer. For use in space, optics must not only have excellent optical performance, but must also withstand extreme environmental conditions. Another field of application is laser beam shaping, such as the production of top hat distributions. For example, in a beam shaping system with two aspheric lenses used to generate a top hat distribution, the first lens redistributes the incident laser beam (Gaussian distribution) in such a way that a uniform intensity distribution appears at a distance . The beam is then collimated with a second beam - creating a typical top hat distribution. Such aspherical applications are for example in material processing (eg cutting metals), but are of interest in medicine (eg ophthalmology). ). For market or new applications the aspherical range of lenses is from the meter. Using them can greatly reduce the total number of lenses used in the lens and increase the possible measurement range. Another plus: Reducing lens usage also makes the lens much lighter.

Corner prisms are also called retroreflectors, which are the above-mentioned prisms made of BK7 or UV Fused Silica. We can provide customized corner cube prisms in various sizes. The incident end face can be coated with AR film as required, and the reflective surface can be coated with metal film. Advantages of corner cube prisms: Prisms are not sensitive to the incident angle of incident light. When incident within a certain range of incident angles, the outgoing light or image will be reflected by 180°, which is an ideal reflective optical element.