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Dichroic Beam Splitters

Long/Short Wave Pass Filters/Combiners

Long/Short Wave Pass Filters/Combiners

 

1. Substrate:

- Material: UV fused silica or BK-7
- 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 @ 633nm for super thin plate windows

- Angular Deviation:

:: ±3 arcmin

- Bevel:

:: < 0.5mm @ 45° typical

 

2. Reflectance:

- 1st Surface: R ≥ 99.5% at user specified wavelength

- 2nd Surface: Anti-reflection coating, Rp ≤ 0.25%, Runp ≤ 0.75%, Rs ≤ 1.3% @ 45°

 

3. Transmittance:

- Long Wave Pass: Tave > 90%

- Short Wave Pass: Tave > 85%

 

4. Damage Threshold:

- 10 J/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.

 

 

[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 or 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

Example: RPDBS-Tp532-Rs633-45-150-BK

Regular Plate Dichroic Beamsplitter + Transmitting P-pol 532nm + Reflecting S-pol 633nm + Angle of Incidence 45° + 1.50" + BK-7 glass.

 

[STDBS]-[Tpol λ]-[Rpol λ]-[AOI]-[Size]-[Material]

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 or 45 [025]
(25mm)
$195

Example: STDBS-Tp532-Rs633-45-150-FS

Super Thin Plate Dichroic Beamsplitter + Transmitting P-pol 532nm + Reflecting S-pol 633nm + Angle of Incidence 45° + 1.50" + Fused Silica 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.

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