History of Dichroic Mirrors
Dichroic mirrors, also known as two-color mirrors, play an important and irreplaceable role in the field of laser technology. The technology can be traced back to the mid-20th century. At that time, with the emergence and development of laser technology, in order to better control and utilize lasers, researchers began to explore optical components that can produce different optical responses to light of different wavelengths. After continuous research and experiments, dichroic mirrors came into being. After decades of development, it has now become an indispensable key component in the laser technology industry.
From the appearance, the dichroic mirror is very similar to an ordinary mirror. It is a smooth and reflective optical lens, but its function far exceeds that of an ordinary mirror. It has unique and precisely controllable optical properties. By carefully designing its internal optical coating structure, its transmittance and reflectivity of light of different wavelengths can be strictly controlled. Specifically, for light in a certain specific wavelength range, the dichroic mirror is like an unobstructed transparent channel, and these lights can almost completely pass through the lens at a very high ratio. For light in other wavelength ranges, the dichroic mirror turns into an efficient reflector, reflecting them back almost completely. This selective effect on light of different wavelengths is the core advantage of the dichroic mirror and the key to its unique role in the optical system.
In the actual optical system construction process, the dichroic mirror is usually placed at an incident angle of 45 degrees. Such a sophisticated design can make full use of its optical properties to separate specific light from the mixed light source. Taking laser display technology as an example, in a laser projector, the light source often contains a variety of laser beams of different wavelengths, which cannot directly form a high-quality image when mixed together. The dichroic mirror can play its magical ability of “light splitting”. It can accurately separate the three primary colors of red, green and blue lasers from the mixed light source, and then guide them to different optical paths for modulation and processing. After each primary color laser is precisely controlled and adjusted, it is recombined and projected onto the screen to present a colorful and clear image.
In addition, in fluorescence microscopy technology, dichroic mirrors also play a key role. In the optical path system of a fluorescence microscope, a dichroic mirror reflects the excitation light (such as blue light of a specific wavelength) onto the sample, stimulating the fluorescent substance in the sample to emit a fluorescent signal. The fluorescence emitted by the fluorescent substance (usually green light of a different wavelength, etc.) can pass through the dichroic mirror and be received and imaged by the detector. Through this ingenious configuration, scientists can clearly observe the distribution and activity of specific fluorescent markers in the sample, providing strong technical support for biomedical research, disease diagnosis and other fields.
With the continuous advancement of science and technology and the continuous innovation of optical technology, the dichroic mirror will surely demonstrate its outstanding value in more cutting-edge fields with its unique performance advantages, and contribute important forces to promote the development and progress of human science and technology.
We have many plane optical beam splitters in stock and also accept customization. If you are interested, please fell free to contact us.
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Hanzhong Brisun Optics Co., Ltd. Is the high precision optical element manufacturer provides customized production of Various optical lenses, including spherical lens, cylindrical lens, optical window, mirror, prism, filter, metal base mirror and other high-precision optical elements. The base materials include various optical glass, fused quartz, calcium fluoride (CaF2), zinc selenide (ZnSe), germanium (GE), silicon (SI), sapphire, metal and other materials. And provide antireflective film, high reflection film, spectroscopic film, metal film and other optical coatings.
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