atoptik

  uv dichroic filter   are highly precise optical components designed to selectively transmit specific wavelengths of light while reflecting others within a narrow range. Unlike ir dichroic mirror , which are characterized by the color of light they reflect, dichroic filters focus on the color of light they allow to pass through. These dichroic bandpass filter   remove unwanted wavelengths from white light sources to produce light that appears highly saturated to the human eye.   Overview of optical dichroic filter Dichroic mirrors, often referred to as cold mirrors, are commonly used behind light sources to reflect visible light forward while allowing infrared light to pass through the back of the fixture. This design achieves bright illumination while reducing heat, making them ideal for applications such as quartz halogen lamps, slide projectors, and modern indoor lighting. However, their use in enclosed fixtures can pose fire hazards due to infrared radiation, re...

  cylindrical glass lens   are mainly used in imaging systems, high-precision test instruments, and laser technology. AT OPtical, it can provide flat convex cylinder, flat concave cylinder, double convex cylinder, double concave cylinder, etc.   Comparing Spherical and Cylidnrical Lenses   Spherical lenses have spherical surfaces for converging or diverging light, commonly used in glasses and microscopes.   Cylindrical lenses have curvature in one direction, used for beam shaping, often in laser applications.   FAQs of Cylindrical Lens Q What materials are commonly used to make cylindrical lenses? A At Optical make widely types of cylindrical lenses according to the material of BK7, H-K9L, fused silica, Silicon and so on.   What are the applications of cylindrical lenses? A High precision tester and high power laser: used for linear focusing and shaping of laser beam. long distance line interferometer ‌ for collimating and focusing beams.   Linear...

  Cut-off filter coatings are designed to achieve high transmittance within a specific wavelength band while exhibiting a sudden transition to high reflection (suppression) for light outside this band. Under vertical incidence conditions, filters that suppress the short-wave region and transmit the long-wave region are termed long-wave pass (LWP) filters; conversely, those that suppress the long-wave region and transmit the short-wave region are called 3db cutoff frequency low pass filter .   Overview of Cut-Off Filter A cut off frequency band pass filter   refers to an optical component that can eliminate all long-wave or short-wave light from composite light, retaining only the desired wavelength range. Generally divided into two types: short-wave cut-off filters and long-wave cut-off filters, their principle primarily relies on the interference effects of optical coatings and the transmission/reflection characteristics of specific wavelengths on the filter. lc filter c...

  Brewster windows   are primarily employed in laser cavities to generate beams with high polarization purity. When unpolarized light strikes an uncoated substrate at Brewster's angle, the reflected component becomes completely S-polarized while the transmitted portion remains partially P-polarized. Multiple passes through the substrate significantly attenuate the S-component in the transmitted beam, thereby producing a highly P-polarized output. Multilayer thin-film polarizing coatings can be applied to these substrates to substantially enhance both single-pass efficiency and extinction ratio.   Overview of Brewster Window Brewster windows are uncoated optical substrates that serve as effective polarizers when used in series. When oriented at Brewster's angle, these windows transmit the P-polarized component of incident light with minimal reflection loss while partially reflecting the S-polarized component, thereby enhancing the degree of polarization for partially polar...