NF650 High-Density Negative Filter: Precision Red Light Suppression for Critical Applications | OD6+ Blocking at 650nm
In applications where ambient red light or laser emissions compromise performance – from scientific imaging to industrial automation – uncontrolled 650nm radiation creates noise, glare, and safety hazards. Manufactures solves this with the NF650 Negative Filter: a high-density spectral barrier engineered to deliver absolute suppression of 650nm red light while transmitting desired UV, visible, or NIR wavelengths.
- Details
Defend Sensitive Systems Against 650nm Red Light Interference
In applications where ambient red light or laser emissions compromise performance – from scientific imaging to industrial automation – uncontrolled 650nm radiation creates noise, glare, and safety hazards. Manufactures solves this with the NF650 Negative Filter: a high-density spectral barrier engineered to deliver absolute suppression of 650nm red light while transmitting desired UV, visible, or NIR wavelengths.
Engineered for Optical Defense
Targeted 650nm Suppression: Blocks >99.9999% of 650nm light (OD6+ optical density)
Broadband Transmission: High transmittance (>90%) in non-critical bands (customizable 300–600nm or 700–1100nm)
Steep Transition Edges: Sharp cutoff slopes ensure precise spectral isolation
Zero Signal Distortion: Maintains wavefront accuracy for imaging applications
Critical Applications
Laser Safety Systems: Protect sensors/operators from 650nm diode lasers
Darkroom Imaging: Eliminate darkroom safe-light fogging in film/CCD workflows
Astronomy & Astrophotography: Suppress light pollution for enhanced nebula imaging
Industrial Machine Vision: Block red indicator LEDs that disrupt inspection algorithms
Medical Devices: Filter surgical guidance lasers in ophthalmic equipment
Spectroscopy: Isolate excitation sources in Raman systems
Rugged Optical Performance
Absorptive Glass Substrate: Schott BG or equivalent red-absorbing glass
Hardened Coatings: Scratch-resistant surface (MIL-C-675C compliant)
Environmental Stability: Minimal shift (-30°C to +85°C operating range)
Low Autofluorescence: Prevents signal contamination in low-light detection
Integration Options
Standard Sizes: 25.4mm, 50mm rounds; 25x36mm rectangles
Custom Solutions: Request transmission bands, thickness (1-5mm), AR coatings
Compatibility: Mounts in lens holders, filter wheels, or OEM assemblies
