Precise spectral screening is essential for high-precision medical detection, spectroscopic analysis and intelligent imaging systems. Tailored for visible and near-infrared spectral separation, the SP900 shortpass optical filter delivers high-efficiency light transmission and deep infrared blocking performance. It effectively eliminates stray light interference, improves signal-to-noise ratio (SNR), and serves as a core optical component for biomedical instruments, scientific analysis equipment and machine vision systems.
The SP900 filter features a sharp spectral edge at 900 nm. It allows high-transmission coverage from 450 nm to 900 nm while achieving deep blocking in the 950 nm–1100 nm near-infrared band. With stable optical coating consistency and excellent spectral selectivity, it ensures reliable and accurate spectral filtering for rigorous optical measurement environments.
Key Optical Specifications
Passband Range: 450nm–900nm
Maximum Transmittance: T > 95%
Cutoff Wavelength: 900nm
Blocking Range: 950nm–1100nm
Blocking Depth: T < 0.1% (customizable)
Main Application Fields
1. Fluorescence Microscopy Imaging
The SP900 filter transmits effective excitation light while blocking unwanted near-infrared stray light. It significantly reduces background noise, improves image contrast and SNR, and supports high-precision biological microscopic observation.
2. Biomedical & Clinical Detection
Widely adopted in biochemical analyzers, clinical diagnostic instruments and life science equipment. It accurately extracts valid spectral signals, eliminates infrared interference, and guarantees precise and repeatable medical detection results.
3. Precision Spectroscopy Analysis
Ideal for Raman spectroscopy, fluorescence excitation measurement and multi-spectral imaging systems. The filter purifies target optical signals by filtering out out-of-band noise, greatly enhancing spectral analysis accuracy.
4. Industrial Machine Vision & Imaging
Compatible with CCD cameras, digital imaging systems and industrial inspection devices. It optimizes incident spectral quality, improves image clarity and enhances the detection sensitivity of visual inspection systems.
5. Biometric Recognition Systems
Applied in facial recognition, fingerprint identification and iris recognition equipment. It suppresses ambient infrared interference, purifies imaging light sources and improves recognition accuracy and stability under complex lighting conditions.
6. Optical Instruments & Stage Lighting Control
Suitable for precision optical instruments, fiber illumination and professional stage lighting systems. It realizes accurate spectral trimming and stable light source optimization for diverse optical modulation scenarios.
