45 degree fluorescence dichroic mirror

Feature

Fluorescent dichroic mirror as a low absorption loss long wave pass filter

The dura mater is easy to operate and clean

Resistant to UV and chemical damage

The fluorescent dichroic mirror divides the light beam into transmitted light and reflected light based on wavelength. The high reflectivity band of the long wavelength fluorescent dichroic mirror is smaller than the cutoff wavelength, and the high transmittance band is larger than the cutoff wavelength. Ruicheng Optoelectronics also provides short wave, high reflectivity beams with longer cutoff wavelengths and high transmittance beams with smaller cutoff wavelengths through dichroic mirrors.

Our fluorescent dichroic mirrors have multiple cutoff wavelengths to choose from, ranging from 325 to 1800 nm. They have a transmittance of over 85% and a reflectance of over 90% in the specified wavelength range. They are designed for 45° Incident angle, these optical components can also be used for beam combining applications, combining beams with wavelengths smaller than the cutoff wavelength and beams with wavelengths greater than the cutoff wavelength into one beam of light. They are also often used to separate light of different colors, but overlaid in space.

One surface of the fluorescent dichroic mirror is coated with a dichroic film, and the other surface is coated with an anti reflective film. For thermosensitive applications, Ruicheng Optoelectronics also provides hot and cold mirrors.

Application

Fluorescence microscopes commonly use long wavelength dichroic mirrors. The excitation light is reflected into the objective mirror through a dichroic lens, and the emitted fluorescence (longer than the wavelength of the excitation light) enters the scientific camera or photomultiplier tube (PMT). Through a two-color mirror. The backscattered or excited light from the sample will be reflected again by the dichroic mirror to prevent it from entering the camera or photomultiplier tube and forming stray signals.

Surface quality and durability

Our company's dichroic mirrors are coated with a hard film on a UV quartz substrate using ion beam sputtering. They have good transparency within the working wavelength range, almost no spontaneous fluorescence, and a very low coefficient of thermal expansion, making them very suitable for applications from UV to near-infrared. The scratches on these hard films can be cleaned and treated like regular glass. Compared with soft films, hard films are not affected by humidity, can withstand higher radiation intensity, and are exposed to ultraviolet radiation for a long time without significant deterioration or burns.