Plate Beamsplitters

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Plate Beamsplitters

Plate Beamsplitter with AR Coating

EMF’s broadband linear plate beamsplitters are a type of beamsplitter used in many life sciences, imaging, or laser applications, as well as in the entertainment and design industry. The coating is nearly wavelength independent across the visible spectrum. Therefore, both beams propagating from the beamsplitter are virtually neutral in color. Since there is very little light loss due to absorption, the sum of the reflected and transmitted beam intensity nearly equals that of the incident beam.

EMF’s plate beamsplitters are typically designed for a 45° angle of incidence (AOI), and when positioned at a 45° AOI a portion of the light striking the plate beamsplitter is transmitted, while another portion is reflected – therefore it is possible to produce beams of equal or varying intensity.

They are available with the second surface coated with an Anti-Reflective (AR) coating to enhance its overall efficiency and to prevent unwanted ghost reflections.

Product SKUs

Reflecting Transmitting Ratio	10:90	Coating Specification	Surface 1: Dielectric, ±5% R/T @ 550nm
Coating Type	Metal	Cut-Off Wavelength	1000 nm
Cut-Off Tolerance	±15 nm	Transmission Region	400-550 nm
Transmission (min)	85%	Reflection Region	21.00%
Reflection (min)	90%	Optical Density	0.3 OD
Density Tolerance	± 5% of density	Operating Range	190 – 650 nm
Wavelength Range	400-700nm	Substrate	Float Glass
Size (inches)	1 x 0.25	Size (mm)	12.0mm x 19.0mm
Clear Aperture	80%	Size Tolerance	±0.38mm
Parallelism	≤ 3 arc min.	Thickness (mm)	1.0 mm nominal
Thickness Tolerance	± 0.25 mm	Typical Energy Density Limit	0.2 J/cm2 @ 532nm, 10ns
Scratch/Dig	80/50	Edges	Cut
Surface Quality	80-50	Surface Flatness	4 – 6λ
Optical Coating	Metallic alloy	Angle of Incidence	45°

Coating Specification	Surface 1: Dielectric, ±5% R/T @ 550nm	Wavelength Range	400-700nm
Angle of Incidence	45⁰	Substrate	Float Glass
Size (mm)	12.0mm x 19.0mm	Size Tolerance	±0.38mm
Thickness (mm)	1.0 mm nominal	Edges	Cut
Surface Quality	80-50	Surface Flatness	4 – 6λ

Thickness (mm)		Reflecting Transmitting Ratio	25/75
Coating Specification	Surface 1: Dielectric, ±5% R/T @ 550nm Surface 2: AR ¼λ MgF2 @ 550nm	Wavelength Range	400-700nm
Angle of Incidence	45⁰	Substrate	Float Glass
Size (mm)	75.0 x 75.0	Size Tolerance	±0.38mm
Thickness (mm)	1.0 mm nominal	Edges	Cut
Surface Quality	80-50	Surface Flatness	4 – 6λ

Reflecting Transmitting Ratio	25/75	Coating Specification	Surface 1: Dielectric, ±5% R/T @ 550nm Surface 2: AR ¼λ MgF2 @ 550nm
Wavelength Range	400-700nm	Angle of Incidence	45⁰
Substrate	Float Glass	Size (mm)	12.5 x 17.5mm
Size Tolerance	±0.38mm	Thickness (mm)	1.0 mm nominal
Edges	Cut	Surface Quality	80-50
Surface Flatness	4 – 6λ

Coating Specification	Surface 1: Dielectric, ±5% R/T @ 550nm Surface 2: AR ¼λ MgF2 @ 550nm	Wavelength Range	400-700nm
Angle of Incidence	45⁰	Substrate	Float Glass
Size (mm)	12.5mm Dia	Size Tolerance	±0.38mm
Thickness (mm)	1.0 mm nominal	Edges	Cut
Surface Quality	80-50	Surface Flatness	4 – 6λ

Reflecting Transmitting Ratio	25/75	Coating Specification	Surface 1: Dielectric, ±5% R/T @ 550nm
Wavelength Range	400-700nm	Angle of Incidence	45⁰
Substrate	Float Glass	Size (mm)	18.0 x 30.0mm
Size Tolerance	±0.38mm	Thickness (mm)	2.0 mm nominal
Edges	Cut	Surface Quality	80-50
Surface Flatness	4 – 6λ

Reflecting Transmitting Ratio	25/75	Coating Specification	Surface 1: Dielectric, ±5% R/T @ 550nm
Wavelength Range	400-700nm	Angle of Incidence	45⁰
Substrate	Float Glass	Size (mm)	20.0 x 27.0mm
Size Tolerance	±0.38mm	Thickness (mm)	1.0 mm nominal
Edges	Cut	Surface Quality	80-50
Surface Flatness	4 – 6λ

Thickness (mm)		Reflecting Transmitting Ratio	25/75
Coating Specification	Surface 1: Dielectric, ±5% R/T @ 550nm	Wavelength Range	400-700nm
Angle of Incidence	45⁰	Substrate	Float Glass
Size (mm)	20.0 x 37.0mm	Size Tolerance	±0.38mm
Thickness (mm)	1.0 mm nominal	Edges	Cut
Surface Quality	80-50	Surface Flatness	4 – 6λ

Thickness (mm)		Reflecting Transmitting Ratio	25/75
Coating Specification	Surface 1: Dielectric, ±5% R/T @ 550nm	Wavelength Range	400-700nm
Angle of Incidence	45⁰	Substrate	Float Glass
Size (mm)	25.0 x 38.0	Size Tolerance	±0.38mm
Thickness (mm)	1.5 mm nominal	Edges	Cut
Surface Quality	80-50	Surface Flatness	4 – 6λ

Thickness (mm)		Reflecting Transmitting Ratio	25/75
Coating Specification	Surface 1: Dielectric, ±5% R/T @ 550nm	Wavelength Range	400-700nm
Angle of Incidence	45⁰	Substrate	Float Glass
Size (mm)	25.0 x 38.0	Size Tolerance	±0.38mm
Thickness (mm)	3.0 mm nominal	Edges	Cut
Surface Quality	80-50	Surface Flatness	4 – 6λ

Plate Beamsplitters

EMF

Plate Beamsplitter with AR Coating

Product SKUs

Plate Beamsplitter, 10R/90T, 12 x 19mm x 1mm thick

Plate Beamsplitter, 10R/90T, 12 x 19mm x 1mm thick

Plate Beamsplitter, 25R/72T, 75 x 75mm x 1mm thick, AR on Side 2

Plate Beamsplitter, 25R/75T, 12.5 x 17.5mm x 1mm thick, AR on Side 2

Plate Beamsplitter, 25R/75T, 12.5mm Dia x 1mm thick, AR on Side 2

Plate Beamsplitter, 25R/75T, 18 x 30mm x 2mm thick

Plate Beamsplitter, 25R/75T, 20 x 27mm x 1mm thick

Plate Beamsplitter, 25R/75T, 20 x 37mm x 1mm thick

Plate Beamsplitter, 25R/75T, 25 x 38mm x 1.5mm thick

Plate Beamsplitter, 25R/75T, 25 x 38mm x 3mm thick

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