Dia12.7mm Dichroic Coating Beamsplitters Optical Color Filter Optical Dichroic Filter

• After-sales Service: Repair, Replace, Refund
• Warranty: 3-Year
• Usage: Lighting, Medical, Optical, Photography, Astronomical
• Model NO.: Dichroic F13
• Thickness Range: 2mm-5mm
• Color: Transparent
• Type: Color Filter
• Principle: Cut-off Filter
• Material: Glass
• Angle of incidence: 45°
• Shape: Customized
• Certification: RoHS, ISO
• Customized: Customized
• Substrates: UV Fused Silica, Optical Color Glass, Borofloat an
• Thickness: Customized, From 1mm to 10mm
• Dimension: Customized, From 2mm to 100mm
• Dimension Tolerance: up to 0.25mm
• Thickness Tolerance: up to 0.25mm
• Flatness: up to 1/4L PV@633nm
• Surface Quality: up to 40-20
• Parallelism: up to 3arcsec
• Optical Quality: Commercial Grade
• Clear Aperture: >90% Centered
• Bevel: Break Sharp Edges
• Coatings: Dichroic coating, Thin-film coatings etc...
• Coating Durability: Per MIL-C-48497A moderate abrasion
• OEM: Available
• Humidity Resistance: Per MIL-C-48497A
• Transport Package: Carton, Blister, Customized
• Specification: Customized
• Trademark: Band-Optics
• Origin: China
• HS Code: 9001909090
• Production Capacity: 100000piece/Month

Product Description

Specification

Product Name:	Optical Dichroic Filter
Substrates:	UV Fused Silica, Optical Color Glass, Borofloat Glass
Size Tolerance:	+0/-0.25mm
Thickness:	Customized
Usable Aperture:	>90% Size
Surface Quality:	40-20 or better (Per MIL-PRF-13830B)
Optical Quality:	Commercial Grade
Wavefront Distortion::	1/4 wave or better
Parallelism:	30 arcsec or better
Angle of Incidence:	0 or 45 degree
Coatings:	Dichroic Coatings, Thin-film Coatings etc...
Bevels:	Break all sharp edges
Specification Temperature:	-50 to 80 °C
Humidity Resistance:	Per MIL-C-48497A
Mechanical:	Unmounted or Mounted

Product Description

The key advantages and applications of your optical dichroic filters:

Optical Dichroic Filters: High-Power, Low-Heat Solutions for Precision Optics

Unlike absorptive filters that risk thermal damage by converting unwanted light into heat, dichroic filters achieve spectral separation with minimal energy absorption—typically less than 5%. This makes them ideal for high-power laser systems, heat-sensitive imaging, and continuous industrial use.

Engineered for versatility, they support standard configurations (e.g., 45° beam splitting) and custom designs (e.g., multi-band separation for hyperspectral imaging). Compatible with lasers, microscopes, and spectral analyzers, they serve industries from automotive LiDAR to space-borne sensors, meeting strict environmental standards for humidity, temperature cycling, and vibration resistance.

Key Features

1. Spectral Performance
1). Dual-band design: One optic acts as both a short-pass and long-pass filter with steep edges (e.g., 740 nm SP / 940 nm LP) so reflection and transmission bands overlap <1 %.
2). Single-part beam-combining: Vis (400-740 nm) reflected to camera, NIR (940-1700 nm) transmitted to LiDAR receiver—no second filter required.
3). Wavelength coverage: 175 nm – 3.2 µm standard; UV (175-400 nm), VIS (400-700 nm), NIR-MIR (0.7-3.2 µm) options.
4). Substrate choices: UV-grade fused silica (UV), optical glass (VIS), ZnSe (IR) for lowest absorption in the mid-IR.

2. Laser-Damage & Lifetime
1). Hard dielectric stack: TiO₂ / SiO₂ (or Ta₂O₅ / SiO₂) layers deposited by IBS or e-beam.
2). Damage threshold: ≥ 10 J cm^-² @ 1064 nm, 10 ns, 20 Hz, Ø200 µm spot (100-on-1, ISO 21254).
3). Suitable for multi-kW CW fiber lasers and ultrafast (ps/fs) harmonic separators (e.g., 532 nm vs 1064 nm).

3. Surface & Scatter
1). Surface quality: 20-10 or 10-5 scratch-dig (MIL-PRF-13830B).
2). Microroughness ≤ 1 nm rms after coating; keeps fluorescence crosstalk <0.1 % (488 nm ex / 520 nm em).
3). Coating stress balanced → transmitted wavefront error ≤ λ/10 @ 632.8 nm over clear aperture.

4. Mechanical Form Factor
1). Diameters: 3 mm – 400 mm; thickness 0.5 mm – 25 mm (aspect ratio ≥ 15:1 for large parts to minimize sag).
2). Standard shapes: round, rectangular, wedged (0.5°–3°) to eliminate etalon fringes.
3). Edge seal option for outdoor LiDAR heads (–40 °C to +85 °C, 95 % RH, 1000 h salt-fog).

5. Typical Applications
1). LiDAR / ToF cameras: merge imaging and ranging paths.
2). Multi-kW laser combiners: 400 mm parts handle 10 kW fiber lasers with water-cooled mount.
3). Fluorescence microscopy & flow cytometry: clean separation of exciter and emitter.
4). Ultrafast harmonic separators: 515 nm vs 1030 nm (Yb), 532 nm vs 1064 nm (Nd).

6. Quick Order Codes (examples)
1). D740-940-25mm: 25 mm Ø, 740 nm SP / 940 nm LP, 10-5, ≥10 J cm^-², fused silica.
2). D1030-1064-100-ZnSe: 100 mm Ø, 1030 nm SP / 1064 nm LP, 20-10, 5 kW CW, ZnSe substrate.

Product Overview

Optical Dichroic Filters FAQ

1. How are optical dichroic filters different from regular colored glass filters?

A:
1). Colored glass absorbs the "wrong" colors and turns them into heat; that heat can crack or melt the filter in high-power systems.
2). A dichroic coating reflects the unwanted wavelengths instead, so the substrate stays cool.
3). Edge is 5× sharper (<5 nm vs. >20 nm), which gives you cleaner channel separation in multi-band instruments.

2. Can I use them at angles other than 0°?

A:
1). Yes. Standard parts are optimized for 0°, but we routinely supply 30°, 45° and 60° versions.
2). Expect a +5–10 nm blue-shift for s-polarized light and a slightly smaller red-shift for p-polarized light at 45°; we pre-compensate the coating design so the specified edge lands on the wavelength you need.

3. What laser power can they survive?

A:
1). "Standard hard coat" catalog parts: 5 J cm^-², 10 ns @ 1064 nm or 1 kW cm^-¹ CW at any wavelength 400–2000 nm.
2). Ultrafast-optimized coating: 20 J cm^-², 100 fs @ 800 nm (or equivalent 1 TW cm^-² peak).
3). Give us wavelength, pulse width, repetition rate and beam diameter and we will certify a LIDT for your exact job.

4. Are custom wavelength or multi-band shapes possible?

A:
1). Any edge from 250 nm to 5 µm, ±2 nm tolerance.
2). Multi-zone coatings on one substrate (e.g., 740 SP + 1020 LP in a single filter).
3). Add AR on the back side to <0.5 % reflection, or integrate polarizing or angle-tolerant coatings for 3-D/AR/VR beam combiners.

5. Mechanical options?

A:
1). Sizes from 2 mm Ø to 150 mm Ø or 100 × 200 mm rectangular.
2). Thickness 0.2–6 mm; thermal-expansion-matched substrates (BOROFLOAT, fused silica, sapphire).
3). Mounted or unmounted; black anodized aluminum rings with 25 mm/C-mount/S-mount threads available.

Inspections

Company History

Production Line

FAQ

Q: What are your main products?

A: Optical Components: Aspherical Lenses, Spherical Lenses, Cylindrial Lenses, Lens Assemblies, Optical Windows, Optical Mirrors, Optical Prisms, Optical Filters, and Other Special Shaped Optics......
 

Q: What's your MOQ?

A: Normally one piece. If more, we can talk about discount. You can ship with other parts together .

Q: How about the delivery time?

A: For stocks, within one week after the payment. As to customized products, the delivery time will be negotiated according to your requirements.

 

Q: Can i get a sample to check the quality?

A: YES, we are glad to provide samples for your test. And there is discount for Trade Assurance Sample Order.

 

Q: Can you offer OEM service?

A: YES. We will custom the material, specifications and optical coatings for your optical components as your requirements.

 

Q: How to pay?

A: T/T, L/C, Western Union, Cash, Credit Card, Paypal, Alipay, MoneyGram, Assurance payment......

 

Q: What's the way of shipping?

A: We accept DHL, Fedex, TNT, UPS, EMS, SF and etc. If you have your own express number, it's great.

 

Q: How to guarantee the quality of your products? 

A: 1) Strict detection during each production process. 

2) Advanced metrology solutions: ZYGO, Mitutoyo, Agilent, TAYLOR HOBSON, TRIOPTICS, MOELLER-WEDEL.....

3) Strict inspection on products before shipment and intact product packaging ensured.

 

Q: Any other good service your company can provide?

A: 24-hour after-sale service and long-time maintenance......

Accepted delivery terms: FOB, CIF, EXW, DDU, DDP, Express.....
  Accepted payment currencies: USD, EUR, RMB......
  Accepted Languages: English, Japanese, Chinese, Spanish, Russian.....