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Optical beamsplitters divide incident light or laser beams into two optical paths. They reflect a certain proportion of the incident light like an optical mirror with an angle of incidence of 45°. At the same time, they allow the remaining light to pass through in the 0° direction. The multilayer dielectric thin film coating applied to the input side of the beamsplitters determines the optical R:T beam-splitting ratio. A broadband anti-reflection coating on the back of the beamsplitter prevents unwanted secondary reflections. So-called "ghost images" or phantom laser beams do not occur.
Unlike dichroic beamsplitters, such as our SIR filters or SHD mirrors, the DST-splitter works neutrally. Instead of separating different optical spectra, it splits visible light beams or images color neutral. Furthermore, light loss caused by unwanted reflections from the backside of the optics reduces to a minimum.
A non-metallic construction of our DST-beamsplitter plates ensures excellent durability and high abrasion resistance. Their dielectric layer system nearly absorbs no light in the nominal wavelength range. In contrast to metallic beamsplitters that usually lose a large portion of the incidence light by absorption, energy losses are minimal. The DST-beamsplitters can also work as a splitter for laser beams with up to medium laser power. Many customers use them in reference measurement systems and optical benches.
We designed all our optical DST-beamsplitters for light with random polarization. When using a polarized light source or a laser, the real-world splitter's ratio may deviate from the specifications in this datasheet, as we don't define them in terms of polarizing effects. However, this does not generally exclude optical applications with polarized light sources. You can often achieve the desired division by selecting a higher or lower existing splitting ratio. The cost is drastically reduced compared to a batch of custom-coated beamsplitters in such cases.
If you need beam-splitting optics for polarized light or laser applications, don't hesitate to contact us and provide information on your application's wavelength, required splitting ratio, and other relevant details. We can coat optics with custom ratios according to individual specifications in addition to our standard beamsplitters from the DST300, DST500, and DST700 series. Please use our inquiry form to contact us for assistance, further information, or help with your customized beamsplitter optics.
We are not limited to standard optics with fixed dimensions. Our company specializes in fast manufacturing and delivery of our custom-sized optical beamsplitters. We often deliver custom beam splitters as fast or even faster than is usual for stock items in the market. Moreover, this also applies to large production quantities! You will usually receive our quote within a few minutes, provided you are in our time zone and we have no queries.
Please choose a thickness from the table or click the button below to request a quote for our broadband optical plate beamsplitters with custom dimensions.
Enlarge transmission curve of the DST300
Enlarge transmission curve of the DST500
Enlarge transmission curve of the DST700
R:T = 70:30
R:T = 50:50
R:T = 50:50
R:T = 30:70
|Other thicknesses per request.|
|The thicknesses marked with "✔" are available within 48–h Express Service.|
Note: If you search for cube-beamsplitters, beamsplitter-prisms, non-polarizing beam splitter cubes, or cube beamsplitters for other wavelength areas, please send us a detailed request with all specifications and requirements. Such kinds of optical components are always custom-made and require minimum batch quantities.
All given details and specifications are mean reference values and are not guaranteed. Also, please consider our "Notes on technical specifications".
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Last update 12.08.2022