Dichroic Plate Beamsplitters

Long/Short Wave Pass Filters/Combiners

1. Substrate:
• Material: UV fused silica or BK7
• Clear Aperture: larger than 85%
• Surface Quality (Scratch-Dig):
  
• 10-5 for regular plate windows
• 60-40 for super thin plate windows
  
• Surface Flatness: 
  
• λ/10 @633nm for regular plate windows
• λ/10 per mm @633nm for super thin plate windows
  
• Thickness:
• 0.25" ±0.01" for regular plate windows
• 0.15mm ±0.02mm for super thin plate windows
  
• Angular Deviation: ±3 arc min
• Bevel: <0.5mm @45˚ typical
2. Reflectance:
• 1st Surface: R≥99.5% at user specificed wavelength
  
• 2nd Surface: Anti-reflection coating, R_p≤0.25%, R_unp≤0.75%, R_s≤1.3% @45˚
3. Transmittance:
• Long Wave Pass: T_ave >90%
• Short Wave Pass: T_ave >85%
  
4. Damage Threshold: 10J/cm², 20ns, 20Hz; 1MW/cm², CW @1064nm
   

  Dichroic Plate Beamsplitters are used to separate or combine two different wavelength beams. They can be called as Long Wave Pass or Short Wave Pass Filters (Combiner). When the transmittance for longer wavelength range is maximized, it is called "Long Wave Pass". The "Short Wave Pass" is when the transmittance for the shorter wavelength range is maximized.
  Dichroic Plate Beamsplitters are frequently used at (near) normal or 45° incidence. The region of high reflectivity or low transmission of a dichroic beamsplitter is similar with that of a mirror.
  The transmittance for longer wavelength range is always higher than that for shorter wavelength range. So it is strongly recommend to design the optical setup to use the Long Wave Pass for the applications where the light throughput is critical.

Product List

1. Regular Plate Dichroic Beamsplitter: RPDBS - Tpol λ - Rpol λ - AOI - Size - Material

RPDBS-	Tpol λ (nm)	Rpol λ (nm)	AOI	Size Code	Material	Price (USD)
	Standard Wavelengths: 248, 257, 266, 343, 355, 400, 515, 532, 633, 800, 1030, 1064, and 1550 Ts λ, for S-pol Tp λ, for P-pol Tunp λ, for unpol. Ex, Tp1064: Transmission P-pol for 1064nm	Standard Wavelengths: 248, 257, 266, 343, 355, 400, 515, 532, 633, 800, 1030, 1064, and 1550 Rs λ, for S-pol Rp λ, for P-pol Runp λ, for unpol. Ex, Rs633: Reflection S-pol for 633nm	0, 45	-100- (1.0")	-FS	$285 (<300nm) $265 (<400nm) $225 (≥400nm)
					-BK	$210
				-150- (1.5")	-FS	$375 (<300nm) $340 (<400nm) $300 (≥400nm)
					-BK	$245
				-200- (2.0")	-FS	$470 (<300nm) $450 (<400nm) $410 (≥400nm)
					-BK	$350

2. Super Thin Plate Dichroic Beamsplitter: STDBS - Tpol λ - Rpol λ - AOI - Size

STDBS-	Tpol λ (nm)	Rpol λ (nm)	AOI	Size Code	Price (USD)
	Standard Wavelengths: 355, 400, 515, 532, 633, 800, 1030, 1064, and 1550 Ts λ, for S-pol Tp λ, for P-pol Tunp λ, for unpol. Ex, Tp532: Transmission P-pol for 532nm	Standard Wavelengths: 355, 400, 515, 532, 633, 800, 1030, 1064, and 1550 Rs λ, for S-pol Rp λ, for P-pol Runp λ, for unpol. Ex, Rs1064: Reflection S-pol for 1064nm	0, 45	-025 (25mm)	$195

EX, RPDBS-Tp532-Rs633-45-150-BK: Regular Plate Dichroic BeamSplitter, Transmitting P-pol 532nm, Reflecting S-pol 633nm, Angle of Incidence 45˚ , 1.5", BK7 glass.

NOTE:  

1. The wavelength described in the price section of UV fused silica (-FS) indicates the "Rλ".
2. Any wavelength can be supplied on request. Please contact us for the pricing quote.
3. There could be some "minimum order quantity" in case of custom specifications. Please check it with us.
4. The Tλ and the Rλ shouldn't be too close. Please check this up with us.
5. Please describe your custom requirements on the RFQ form.