T-BSW20R - 25 x 36 mm 50:50 UVFS Plate Beamsplitter, Coating: 250 - 45 – Fosco Connect

T-BSW20R - 25 x 36 mm 50:50 UVFS Plate Beamsplitter, Coating: 250 - 450 nm, t = 1 mm

T-BSW20R - 25 x 36 mm 50:50 UVFS Plate Beamsplitter, Coating: 250 - 450 nm, t = 1 mm

T-BSW20R - 25 x 36 mm 50:50 UVFS Plate Beamsplitter, Coating: 250 - 450 nm, t = 1 mm

T-BSW20R - 25 x 36 mm 50:50 UVFS Plate Beamsplitter, Coating: 250 - 450 nm, t = 1 mm

Fosco Connect Part No.: T-BSW20R

$ 225.00 or

T-BSW20R - 25 x 36 mm 50:50 UVFS Plate Beamsplitter, Coating: 250 - 450 nm, t = 1 mm

Damage Threshold Specifications
Item	Damage Threshold
50:50 UVFS Beamsplitters	4 J/cm² (355 nm, 10 ns, 10 Hz, Ø0.165 mm)

Specification	Value
Split Ratio (R:T)	50:50
Overall Performance^a	T_abs = 50 ± 12%, R_abs = 50 ± 12%, T_abs + R_abs > 99%, \|T_s-T_p\| < 40% and \|R_s-R_p\| < 40%, 45° AOI
Size	25 mm x 36 mm
Diameter Tolerance	±0.1 mm
Thickness	1.0 mm
Thickness Tolerance	±0.1 mm
Transmitted Wavefront Error^b	λ/4 @ 633 nm
Coating on Surface 1^c	250 - 450 nm Beamsplitter Coating for 45° Incidence
Coating on Surface 2^c	Broadband AR Coating for 250 - 450 nm (R_avg < 1.0% within Wavelength Range)
Wedge Angle	None
Wedge Angle Tolerance	None
Substrate	UV Fused Silica
Clear Aperture	>22.5 mm x 32.4 mm
Surface Quality	40-20 Scratch-Dig

a. Specified from 250 - 450 nm
b. Specified over the clear aperture.
c. To distinguish Surface 1 from Surface 2, an engraved arrow on the side of the beamsplitter points to Surface 2. For more details, please see the Drawing tab.

Item #	Size	Thickness	Wedge Angle	Split Ratio (R:T)	Overall Performance
T-BSW19	Ø1/2"	3.0 mm	30 arcmin	50:50	T_abs = 50 ± 12%, R_abs = 50 ± 12%, T_abs + R_abs > 99%, \|T_s-T_p\| < 40% and \|R_s-R_p\| < 40%, 45° AOI
T-BSW20	Ø1"	5.0 mm	30 arcmin	50:50
T-BSW20R	25 mm x 36 mm	1.0 mm	No Wedge	50:50