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Product Parameters
| Specs | Bandpass Filter |
| Dimension | Custom-designed |
| CWL(Center wavelength) | Custom-designed |
| Full width at half maximum | Custom-designed |
| CWL tolerance | ±2nm |
| FWHM tolerance | ±2nm |
| Surface quality | 20-10 S/D |
| Material | Custom-designed |
| Incident angle | ±3° |
| Specs | Notch Filter | ND (Neutral Density) Filter |
| Dimension | Custom-designed | |
| CWL | Custom-designed | |
| Average transmission in passband | ＞90% | |
| Reflectance | ＞99.5% | |
| Cutoff | OD≥6 | |
| Surface quality | 20-10 S/D | |
| Specs | LWP (Long Wave Pass) Filter | Dichroic Filter | ||
| Characteristics | Transmits long waves and cuts off short waves | High transmittance at specific wavelengths; High reflectivity at cutoff wavelengths. | ||
| Dimension | Custom-designed | |||
| CWL(Center wavelength) | Custom-designed | |||
| Transmission band | Custom-designed | |||
| Cutoff band | Custom-designed | |||
| Blocking | ≥OD6 | |||
| Surface quality | 20-10 S/D | |||
| Incident angle | 0° | |||
Product Introduction
RISING EO Optical Filters
—— Scratch‑Resistant, High‑Precision, Custom‑Made
RISING EO manufactures a variety of optical filters including bandpass filters, notch filters, neutral density (ND) filters, long wave pass (LWP) filters, short wave pass (SWP) filters, and dichroic filters. These filters feature high‑precision coatings, scratch‑resistant surfaces, and excellent spectral selectivity. They are used in fiber‑optic communications, industrial lasers, automation equipment, biometrics, medical devices, and beauty equipment.
Applications
Wavelength division multiplexing in fiber‑optic communications
Wavelength selection and protection for industrial lasers
Optical filtering in automated inspection equipment
Biometric identification (fingerprint, facial recognition)
Medical devices (endoscopes, surgical light sources)
Aesthetic equipment (IPL, laser hair removal)
Frequently Asked Questions
Q: How scratch‑resistant is the coating?
A: The hard coating withstands normal cleaning with optical lens wipes or soft cloth. Abrasive materials or hard tools should be avoided. Test reports are available upon request.
Q: Can you make non‑round filters (square, rectangular)?
A: Yes. RISING EO supports round, square, and custom‑shaped filters. Please provide detailed drawings with your inquiry.
Q: What is the minimum FWHM for a bandpass filter?
A: The narrowest FWHM can reach 2 nm in the visible range. Even narrower bandwidths may be possible – please consult our engineers.
Q: Is the optical density (OD) of ND filters adjustable?
A: ND filters are available in fixed OD values (e.g., 0.3, 0.5, 1.0, 2.0). Continuously variable ND filters require special design – please contact us.
