Ultra-Thin
Plate Beamsplitters

Beamsplitters do exactly what their name implies, split a beam at a designated ratio in two directions. Additionally beamsplitters can be used in reverse to combine two different beams into a single one.

Beamsplitters are often classified according to their construction: cube or plate. A plate beamsplitter is a common type of beamsplitter that is composed of a thin glass substrate with an optical coating optimized for a 45° angle of incident (AOI).

Paralight Optics offers ultra thin plate beamsplitters with Partially reflective coating on the front surface and AR coating on the back surface, they are optimized to minimize beam displacement and to eliminate Ghost Images.

Features:

Substrate Materials:

RoHS Compliant

Optical Performances:

Minimize Beam Displacement and Eliminate Ghost Images

Mounting:

Easy to Handle with Mounting

Design Options:

Custom Design Available

Common Specifications:

pro-related-ico — Reference Drawing for

Ultra-Thin Beamsplitter

Note: An ultra-thin plate beamsplitter has a very thin thickness, this feature make it minimize any beam displacement or chromatic dispersion within any optical system. Even though the glass of N-BK7 is extremely thin, it is still able to maintain its reflection and transmission capabilities, similar to conventional plate beamsplitters.

Parameters

Ranges & Tolerances

Type

Ultra-Thin Plate Beamsplitter
Dimension

Mounting diameter 25.4 mm +0.00/-0.20 mm
Thickness

6.0±0.2mm for mounting, 0.3±0.05mm for plate beamsplitters
Surface Quality (Scratch-Dig)

60-40 / 40-20
Parallelism

< 5 arcmin
Split Ratio (R/T) Tolerance

±5% {R:T=50:50, [T=(Ts+Tp)/2, R=(Rs+Rp)/2]}
Clear Aperture

18 mm
Beam Displacement

0.1 mm
Transmitted Wavelength Error

< λ/10 @ 632.8nm
Coating (AOI=45°)

Partially reflective coating on the front surface, AR coating on the back surface
Damage Threshold (Plused)

>1 J/cm², 20ns, 20Hz, @1064nm