Optical Filters & Colored Glass Filters

Precision Filter Solutions for Optical Systems

 

 

 

 

🔷 Custom Optical Filters Tailored for Performance

At Yighen Ultra Precision, we design and manufacture high-performance optical filters for imaging, sensing, spectroscopy, and laser systems. Our capabilities span both thin-film coated filters and colored glass filters, allowing us to meet a wide spectrum of application-specific requirements—from UV to IR.

Whether you're seeking narrow bandpass filters for fluorescence imaging, IR cut filters for sensors, or durable colored glass filters for harsh environments, Yighen provides precision-engineered filter solutions with exceptional transmission, blocking, and uniformity.

 

 

🔶 Optical Filter Types We Offer

We supply custom and standard filter solutions across the following categories:

🔹 Thin-Film Optical Filters (Custom Coated)

• Bandpass Filters (Narrow / Wide)

• Longpass / Shortpass Filters

• Notch Filters

• Edge Filters

• Neutral Density Filters

• Laser Line Filters (High OD, High Transmission)

🔹 Colored Glass Filters (Absorptive Type)

• UV to NIR coverage with broad wavelength blocking

• Available as heat-resistant, chemically stable glass substrates

• Brands include Schott, HOYA, CDGM, or custom glass equivalents

• Thickness range: 0.2 mm – 5 mm

• Shape options: Round, square, rectangular, or custom cut-outs

 

 

🛠️ Optical Coating Capabilities

Our in-house thin-film department provides precision coating for filters:

• Sputtering and Ion-Assisted Deposition (IAD) for durable coatings

• Coating range: 250 nm – 2500 nm

• Optical Density (OD): Up to OD6+

• Surface Quality: 20-10 scratch-dig

• Coating uniformity: <±2% over Ø50 mm

• Custom angle-of-incidence (AOI) filters available (0°–45°)

 

 

📦 Substrates & Material Options

We process a variety of substrates to match your optical system’s requirements:

• Glass: Fused Silica, BK7, B270, Borofloat, Float Glass, Color Filter Glass

• Plastics: PMMA, Polycarbonate (PC), COP, ZEONEX® for low-weight needs

• Custom Optical Glass: Available upon request

• Surface Flatness: λ/10 (or better upon request)

 

 

🧪 Applications of Optical Filters

Industry	Use Cases
🔬 Life Sciences	Fluorescence microscopy, flow cytometry, PCR, OCT
📷 Imaging Systems	IR cut filters, ND filters, color separation, Bayer filters
🛰️ Aerospace & Defense	Laser protection, thermal imaging, targeting optics
💡 Lighting	LED color control, UV blocking, wavelength selection
⚙️ Industrial Sensing	Machine vision, LIDAR, multi-spectral detection

 

 

✅ Why Choose Yighen for Optical Filters?

• 🎯 Application-specific customization (center wavelength, FWHM, AOI, OD)

• 🧪 In-house coating, cutting, polishing, and inspection

• 🛡️ Thermal & environmental durability

• 🔍 Spectral testing with certified metrology

• 🌍 Global delivery and fast prototyping

 

 

🔧 Tolerances & Precision Parameters

• Thickness Tolerance: ±0.05 mm

• Surface Quality: 20-10 / 40-20 per MIL-PRF-13830B

• Clear Aperture: >85%

• Parallelism: <3 arcmin (or custom)

• Transmittance Tolerance: ±2% typical

All filters undergo full spectral inspection, surface QC, and optional environmental testing (humidity, adhesion, abrasion).

 

 

 

 

 

❓ Frequently Asked Questions

Q: What’s the difference between thin-film filters and colored glass filters?
A: Thin-film filters use interference coatings for precision spectral control, ideal for high-performance systems. Colored glass filters use absorptive glass materials for simpler, broader spectral filtering and are often more durable.

Q: Can Yighen coat filters on plastic substrates?
A: Yes, we offer coating services on optical plastics such as PC, PMMA, COP, and ZEONEX for lightweight or disposable systems.

Q: Do you offer transmission curve testing and reports?
A: Absolutely. We can provide transmission and blocking spectra data for every custom filter batch, measured using calibrated spectrophotometers.

 

 

 

 

🎨 Precision Light Control with Custom Optical Filters

Yighen supplies a wide range of optical filters — including bandpass, longpass, shortpass, ND filters, polarizers, and custom color glass — for applications across imaging, fluorescence, laser protection, and sensor calibration.
Whether you need high-transmission dielectric coatings or classic Schott/HOYA glass types, we support precision cutting, polishing, and AR coating integration.

Our filters are manufactured with tight spectral tolerances and are available for prototyping or mass production.

🔵 Request a Filter Sample or Custom Quote
📩 Specify your target wavelength, transmission window, and size — we’ll get back to you within 24 hours.

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Want to review our coating specs or glass filter catalog?
📄 Download Our Optical Filter Datasheet

Looking for system integration or combined filtering & focusing optics?
👤 Learn More About Yighen

 

 

 

 

🔗 Related Content

• 🌫 Infrared Optics
  SWIR and MWIR filters for thermal imaging and environmental sensing.

• 🧪 Optical Metrology & Testing
  Spectral accuracy and transmission validation for filters and coatings.

• 🧷 Optical Coating Services
  Custom dielectric stacks, metallic coatings, and hard-coat AR solutions.

• ⚙️ Opto-Mechanical Design Services
  Integrated filter wheel, lens-barrel, or mechanical holders for modular systems.