Dichroic Mirror For Video Projector

A dichroic mirror is a specialized optical reflector that reflects light in a specific wavelength range while transmitting other wavelengths. It uses the principle of thin-film interference to achieve wavelength-selective reflection and transmission. They are used to split white light into separate color bands or combine light of different colors. Their ability to reflect/transmit targeted wavelength ranges with high efficiency makes them useful in various optical technologies, especially those requiring spectral purity or combing light from different color sources.

 

Our high-performance dichroic mirrors provide unparalleled wavelength selectivity for laser optics, microscopy, telescopy, and display technology. We offer a vast selection of stock and custom dichroic beam splitters, including long pass mirrors, short pass mirrors, bandpass mirrors, and polarizing beamsplitter mirrors. When precision wavelength control and efficiency matter most, you can rely on a dichroic beam splitter from our company. They achieve cut-on/cut-off wavelengths accurate to ±1nm or better, with ultra-narrow bandwidths and enhanced AR/HR coatings. We adhere to the tightest manufacturing and quality standards to ensure every mirror exceeds your requirements. Contact us today to discuss your needs!

 

Features

- Precise cut-on/cut-off wavelength

- High reflectance/transmittance

- Narrow bandwidth

- Suitable for high power/energy

- Environmental durability

 

Parameters

Product name	Dichroic mirror
Transmittance range	695-850nm or custom
Reflection range	650-680nm or custom
Substrates	Fused Silica or custom
AOI	45°
Dimension	15*15*1.1mm or custom
Surface Quality	60/40
Transmittance	80-95%
Blocking Density	OD2-OD6

 

Spectrum Transmission Curve

 

Applications

Dichroic mirrors enable wavelength-selective transmission and reflection for various applications where light must be separated, filtered, or combined based on color or frequency. Their ability to pass some wavelengths while reflecting others gives them utility in fields ranging from laser physics to telecommunications and bioimaging. Some critical applications include:

- Laser applications

- Fluorescence microscopy

- Photometry and radiometry

- Optical filtering

- Fluorescence resonance energy transfer or FRET

- Optical microscopes

- Telecommunications equipment

- Spectroscopy instrumentation

 

What is an optical mirror?

An optical mirror is a surface that reflects light or other electromagnetic radiation. Mirrors are commonly used in optical instruments and systems to manipulate, redirect, or steer light. Some key characteristics of optical mirrors include:

 

• Reflective surface - The mirror contains a highly polished surface, usually made of glass or a metal like aluminum, that reflects light via the law of reflection. The reflective surface is often coated to enhance reflectance or suit a particular range of wavelengths.

 

• Surface quality - The optical surface must be remarkably smooth and defect-free to produce accurate, undistorted reflections. Surface irregularities can scatter light and reduce image quality. Optical mirrors, like dichroic mirrors, are precision polished to minimize surface roughness and imperfections.

 

• Reflectance - The percentage of light reflected by the mirror surface is called its reflectance or reflectivity. A higher reflectance means more light is reflected and less is absorbed or transmitted. Different mirror coatings can achieve near-perfect reflectance for certain wavelength bands.

 

• Radius of curvature - Mirrors can have flat, concave (converging), or convex (diverging) surfaces depending on their application. Curved mirrors focus or spread light, while flat mirrors reflect light at the same angle. The specific curvature depends on focal length or power requirements.

 

• Aperture size - The size or diameter of the reflective mirror surface limits the amount of light that can be reflected or the beam diameter that can be manipulated. More giant aperture mirrors are helpful for telescopes, while small mirrors are ordinary in laser systems.

 

• Mounting - For most applications, the mirror must be mounted to hold it rigidly in the proper orientation without distorting the optical surface. Some mirrors require adjustable mounts that allow precise positioning and alignment.

 

• Protective coating - For mirrors used in high-energy or harsh environments like space, a protective overcoat is sometimes applied to the reflective surface to prevent damage or degradation while preserving reflectance. The coating shields the delicate optical surface from the environment.

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