Broadband Dielectric Beamsplitters

Compare	Model	Compatibility	rankScore	Diameter	Wavelength Range	Material	Surface Quality	Availability	Price	Brand
10B20BS.1 Broadband Dielectric Beamsplitter, 25.4 mm, N-BK7, 480-700 nm $158 In Stock	10B20BS.1 Broadband Dielectric Beamsplitter, 25.4 mm, N-BK7, 480-700 nm	UNIVERSAL	1.0	25.4 mm	480-700 nm	Grade A N-BK7	15-5 scratch-dig	In Stock	$158	Newport
10B20BS.2 Broadband Dielectric Beamsplitter, 25.4 mm, N-BK7, 700-950 nm $168 In Stock	10B20BS.2 Broadband Dielectric Beamsplitter, 25.4 mm, N-BK7, 700-950 nm	UNIVERSAL	1.0	25.4 mm	700-950 nm	Grade A N-BK7	15-5 scratch-dig	In Stock	$168	Newport
10B20BS.3 Broadband Dielectric Beamsplitter, 25.4 mm, N-BK7,1290-1580 nm $177 In Stock	10B20BS.3 Broadband Dielectric Beamsplitter, 25.4 mm, N-BK7,1290-1580 nm	UNIVERSAL	1.0	25.4 mm	1290-1580 nm	Grade A N-BK7	15-5 scratch-dig	In Stock	$177	Newport
10Q20BS.1 Broadband Dielectric Beamsplitter, UVFS, 25.4 mm, λ/10, 480-700 nm $184 In Stock	10Q20BS.1 Broadband Dielectric Beamsplitter, UVFS, 25.4 mm, λ/10, 480-700 nm	UNIVERSAL	1.0	25.4 mm	480-700 nm	UV Grade Fused Silica	15-5 scratch-dig	In Stock	$184	Newport
10Q20BS.2 Broadband Dielectric Beamsplitter, UVFS, 25.4 mm, λ/10, 700-950 nm $190 In Stock	10Q20BS.2 Broadband Dielectric Beamsplitter, UVFS, 25.4 mm, λ/10, 700-950 nm	UNIVERSAL	1.0	25.4 mm	700-950 nm	UV Grade Fused Silica	15-5 scratch-dig	In Stock	$190	Newport
10Q20BS.3 Broadband Dielectric Beamsplitter, UVFS, 25.4mm, λ/10, 1290-1580 nm $205 In Stock	10Q20BS.3 Broadband Dielectric Beamsplitter, UVFS, 25.4mm, λ/10, 1290-1580 nm	UNIVERSAL	1.0	25.4 mm	1290-1580 nm	UV Grade Fused Silica	15-5 scratch-dig	In Stock	$205	Newport
10Q40BS.1 Broadband Dielectric Beamsplitter, UVFS, 25.4 mm, λ/20, 480-700 nm $760 In Stock	10Q40BS.1 Broadband Dielectric Beamsplitter, UVFS, 25.4 mm, λ/20, 480-700 nm	UNIVERSAL	1.0	25.4 mm	480-700 nm	UV Grade Fused Silica	10-2 scratch-dig	In Stock	$760	Newport
10Q40BS.2 Broadband Dielectric Beamsplitter, UVFS, 25.4 mm, λ/20, 700-950 nm $774 In Stock	10Q40BS.2 Broadband Dielectric Beamsplitter, UVFS, 25.4 mm, λ/20, 700-950 nm	UNIVERSAL	1.0	25.4 mm	700-950 nm	UV Grade Fused Silica	10-2 scratch-dig	In Stock	$774	Newport
10Q40BS.3 Broadband Dielectric Beamsplitter, UVFS, 25.4 mm, λ/20, 1290-1580 nm $702 In Stock	10Q40BS.3 Broadband Dielectric Beamsplitter, UVFS, 25.4 mm, λ/20, 1290-1580 nm	UNIVERSAL	1.0	25.4 mm	1290-1580 nm	UV Grade Fused Silica	10-2 scratch-dig	In Stock	$702	Newport
20B20BS.1 Broadband Dielectric Beamsplitter, 50.8 mm, N-BK7, 480-700 nm $260 In Stock	20B20BS.1 Broadband Dielectric Beamsplitter, 50.8 mm, N-BK7, 480-700 nm	UNIVERSAL	1.0	50.8 mm	480-700 nm	Grade A N-BK7	15-5 scratch-dig	In Stock	$260	Newport
20B20BS.2 Broadband Dielectric Beamsplitter, 50.8 mm, N-BK7, 700-950 nm $315 In Stock	20B20BS.2 Broadband Dielectric Beamsplitter, 50.8 mm, N-BK7, 700-950 nm	UNIVERSAL	1.0	50.8 mm	700-950 nm	Grade A N-BK7	15-5 scratch-dig	In Stock	$315	Newport
20B20BS.3 Broadband Dielectric Beamsplitter, 50.8 mm, N-BK7,1290-1580 nm $313 In Stock	20B20BS.3 Broadband Dielectric Beamsplitter, 50.8 mm, N-BK7,1290-1580 nm	UNIVERSAL	1.0	50.8 mm	1290-1580 nm	Grade A N-BK7	15-5 scratch-dig	In Stock	$313	Newport
20Q20BS.1 Broadband Dielectric Beamsplitter, UVFS, 50.8 mm, λ/10, 480-700 nm $360 In Stock	20Q20BS.1 Broadband Dielectric Beamsplitter, UVFS, 50.8 mm, λ/10, 480-700 nm	UNIVERSAL	1.0	50.8 mm	480-700 nm	UV Grade Fused Silica	15-5 scratch-dig	In Stock	$360	Newport
20Q20BS.2 Broadband Dielectric Beamsplitter, UVFS, 50.8 mm, λ/10, 700-950 nm $396 In Stock	20Q20BS.2 Broadband Dielectric Beamsplitter, UVFS, 50.8 mm, λ/10, 700-950 nm	UNIVERSAL	1.0	50.8 mm	700-950 nm	UV Grade Fused Silica	15-5 scratch-dig	In Stock	$396	Newport
20Q20BS.3 Broadband Dielectric Beamsplitter, UVFS, 50.8mm, λ/10, 1290-1580 nm $395 In Stock	20Q20BS.3 Broadband Dielectric Beamsplitter, UVFS, 50.8mm, λ/10, 1290-1580 nm	UNIVERSAL	1.0	50.8 mm	1290-1580 nm	UV Grade Fused Silica	15-5 scratch-dig	In Stock	$395	Newport
20Q40BS.1 Broadband Dielectric Beamsplitter, UVFS, 50.8 mm, λ/20, 480-700 nm $979 In Stock	20Q40BS.1 Broadband Dielectric Beamsplitter, UVFS, 50.8 mm, λ/20, 480-700 nm	UNIVERSAL	1.0	50.8 mm	480-700 nm	UV Grade Fused Silica	10-2 scratch-dig	In Stock	$979	Newport
20Q40BS.2 Broadband Dielectric Beamsplitter, UVFS, 50.8 mm, λ/20, 700-950 nm $1,007 In Stock	20Q40BS.2 Broadband Dielectric Beamsplitter, UVFS, 50.8 mm, λ/20, 700-950 nm	UNIVERSAL	1.0	50.8 mm	700-950 nm	UV Grade Fused Silica	10-2 scratch-dig	In Stock	$1,007	Newport
20Q40BS.3 Broadband Dielectric Beamsplitter, UVFS, 50.8mm, λ/20, 1290-1580 nm $1,024 In Stock	20Q40BS.3 Broadband Dielectric Beamsplitter, UVFS, 50.8mm, λ/20, 1290-1580 nm	UNIVERSAL	1.0	50.8 mm	1290-1580 nm	UV Grade Fused Silica	10-2 scratch-dig	In Stock	$1,024	Newport
30Q20BS.1 Broadband Dielectric Beamsplitter, UVFS, 76.2 mm, λ/10, 480-700 nm $831 In Stock	30Q20BS.1 Broadband Dielectric Beamsplitter, UVFS, 76.2 mm, λ/10, 480-700 nm	UNIVERSAL	1.0	76.2 mm	480-700 nm	UV Grade Fused Silica	15-5 scratch-dig	In Stock	$831	Newport
30Q20BS.2 Broadband Dielectric Beamsplitter, UVFS, 76.2 mm, λ/10, 700-950 nm $730 In Stock	30Q20BS.2 Broadband Dielectric Beamsplitter, UVFS, 76.2 mm, λ/10, 700-950 nm	UNIVERSAL	1.0	76.2 mm	700-950 nm	UV Grade Fused Silica	15-5 scratch-dig	In Stock	$730	Newport
30Q20BS.3 Broadband Dielectric Beamsplitter, UVFS, 76.2mm, λ/10, 1290-1580 nm $855 In Stock	30Q20BS.3 Broadband Dielectric Beamsplitter, UVFS, 76.2mm, λ/10, 1290-1580 nm	UNIVERSAL	1.0	76.2 mm	1290-1580 nm	UV Grade Fused Silica	15-5 scratch-dig	In Stock	$855	Newport
30Q40BS.1 Dielectric Beamsplitter, Fused Silica, 76.2 mm, λ/20, 480-700 nm $2,235 In Stock	30Q40BS.1 Dielectric Beamsplitter, Fused Silica, 76.2 mm, λ/20, 480-700 nm	UNIVERSAL	1.0	76.2 mm	480-700 nm	UV Grade Fused Silica	10-2 scratch-dig	In Stock	$2,235	Newport
30Q40BS.2 Dielectric Beamsplitter, Fused Silica, 76.2 mm, λ/20, 700-950 nm $2,159 In Stock	30Q40BS.2 Dielectric Beamsplitter, Fused Silica, 76.2 mm, λ/20, 700-950 nm	UNIVERSAL	1.0	76.2 mm	700-950 nm	UV Grade Fused Silica	10-2 scratch-dig	In Stock	$2,159	Newport
30Q40BS.3 Dielectric Beamsplitter, Fused Silica, 76.2 mm, λ/20, 1290-1580 nm $2,204 Contact Us	30Q40BS.3 Dielectric Beamsplitter, Fused Silica, 76.2 mm, λ/20, 1290-1580 nm	UNIVERSAL	1.0	76.2 mm	1290-1580 nm	UV Grade Fused Silica	10-2 scratch-dig	Contact Us	$2,204	Newport

Features

Polarization Effects

Our beamsplitting optics are designed for splitting or combining laser beams, which commonly have S-polarized output in a typical scientific setup. S-polarization will be equally split with R/T = 50/50 at 45° incidence. P-polarized beams will be split 30/70 (R/T). Unpolarized light will be split 40/60 (R/T) on average.

Three Broadband Dielectric Beamsplitter Coatings

Beamsplitters are available with a wide selection of broadband dielectric coatings on the reflecting surface and matching anti-reflection coatings on the back surface. Each set of coatings is essentially achromatic across a wide spectral band so that a single optic will work for the entire range of a particular tunable laser, for several laser diode wavelengths, or for most visible laser wavelengths. BS.1 covers the 480-700 nm spectral range, BS.2 covers the 700-950 nm spectral range and BS.3 covers the 1290-1580 nm spectral range.

AR Coated Back Surfaces

An antireflection coating NC.x is applied on the back surface to minimize ghost reflections. Three broadband AR coatings are offered and optimized for 45° angle of incidence beams with <0.75% reflectance. NC.1 covers the 440-700 nm spectral range, NC.2 covers the 660-1000 nm spectral range and NC.3 covers the 1010-1550 nm spectral range.

N-BK7 Substrates for VIS and NIR Applications

N-BK7 is an excellent lens material for general use such as most visible and near infrared applications. It is the most common borosilicate crown optical glass, and it provides great performance at a good value. Its high homogeneity, low bubble and inclusion content, and straightforward manufacturability make it a good choice for transmissive optics.

UV Fused Silica for UV & Broadband Applications

UV Grade Fused Silica is synthetic amorphous silicon dioxide of extremely high purity providing maximum transmission from 195 to 2100 nm. This non-crystalline, colorless silica glass combines a very low thermal expansion coefficient with good optical qualities, and excellent transmittance in the ultraviolet region. Transmission and homogeneity exceed those of crystalline quartz without the problems of orientation and temperature instability inherent in the crystalline form. It will not fluoresce under UV light and is resistant to radiation. For high-energy applications, the extreme purity of fused silica eliminates microscopic defect sites that could lead to laser damage.

Slight Wedge Suppresses Unwanted Fringes

Optics with perfectly parallel faces are unsuited for use as reference elements in laser setups as reflections from both surfaces would be collinear resulting in undesired large period fringes. Introduction of a slight wedge causes unwanted reflections from the second surface to be deflected from the optical path. An arrow on the side points to the non-wedged side (S1) of the beamsplitter, where has the BS.x beamsplitter coating.

Broadband Dielectric Beamsplitters

Broadband Dielectric Beamsplitters

Overview

Products

Specifications