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Beamsplitter plates split an incident image or a laser into a transmission and reflection component. They reflect a specific part of the incident light like an optical mirror and transmit the remaining part like an optical window.
By applying a multi-layer dielectric thin-film coating to the input side, we determine the splitting-ratio of our DST plate beamsplitter optics. On the reverse side, we deposit a broadband anti-reflection layer to eliminate secondary reflections. "Ghost images" and phantom laser beams that occur with beamsplitters without anti-reflection coating on the back are thus avoided, and energy loss caused by reflections from the backside of the optics is reduced to a minimum.
Unlike dichroic beamsplitters, such as our SIR filters or SHD mirrors, our DST plate beamsplitters work in a mostly color-neutral way. Instead of separating different optical spectra from each other, they split light with a visible wavelength neutrally.
The non-metallic construction of the optical coating of our beamsplitter plates ensures excellent durability and high abrasion resistance of the optics. Also, the dielectric layer system of the splitter mirrors exhibits only low optical absorption in the nominal wavelength range. So, in contrast to metallic beamsplitters that usually absorb a large portion of the incidence light, losses are minimal. Hence, you can also use our DST-plate beamsplitters to split laser beams with up to medium laser power. In laser applications, a part of the laser beam is mirrored by 45°, while the rest of the beam is transmitted at 0° (see figure above). This function is a typical requirement for beamsplitters in reference measurement systems or the use in optical benches.
We designed all DST-plate-beamsplitters for light without defined polarization, i.e., non-polarized light. When using our DST-beamsplitters with polarized light sources or with a polarized laser beam, the optical splitting-ratio may deviate from the specifications given here, as we only specify them for random polarization. The DST beamsplitter plates are also not defined in terms of polarization effects. However, this does not generally exclude optical applications with polarized light sources. Often the desired gradation can be achieved by selecting a higher or lower existing ratio of the optics, and the cost can be drastically reduced compared to a batch of custom coated plate beamsplitters. If you need splitter optics for polarized light or a polarized laser beam, please contact us and provide information on wavelength, splitting-ratio, and all relevant details of your application.
In addition to our high-quality standard beamsplitters, the DST300, DST500, and DST700 series, we have capabilities to coat optics with splitting-ratios according to custom specifications. Please use our inquiry form to contact us for technical assistance, further information, and customized beamsplitter optics.
You won't find a shopping cart on our website because we are not limited to standard optics with fixed dimensions. We are specialized in the rapid manufacturing and delivery of our optical plate beamsplitters with customized sizes. We often ship tailor-made beamsplitters just as fast or even faster than stock items are shipped usually. Moreover, this also applies to large production quantities! As a rule, you receive our quotation within a few minutes, provided you are in our time zone, and there are no queries.
To request a quote for our high-quality optical plate beamsplitters with custom dimensions, please choose a thickness from the table or click the button below.
Enlarge transmission curve of DST300
Enlarge transmission curve of DST500
Enlarge transmission curve of DST700
|DST300 plate beamsplitter
R:T = 70:30
|DST500 plate beamsplitter
R:T = 50:50
|DST500T plate beamsplitter
R:T = 50:50
|DST700 plate beamsplitter
R:T = 30:70
|Custom thickness on request.|
|The thicknesses marked with "✔" are also available within 48–h Express Service.|
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