The LP550 long-wave pass filter is a filter that allows light with a wavelength longer than 550nm (nanometer) to pass through, while blocking light with a wavelength shorter than that. The LP550 long-wave pass filter is made of optical grade glass materials, such as K9, BK7, etc. Its surface finish usually meets the national standard level 3 or the US military standard 40-20 standard to ensure effective transmission of light and reduce scattering. The optical characteristics of this filter are that the light source 560-1200nm with a cutoff wavelength of 350-490nm has high transmittance. In this part of the light that is transmitted, the spectrum will be yellow, which can be used in various color filtering products, and is also essential in IPL beauty.
Model：LP550 longpass filter
Specifications: Customized
Material: Optical Glass
Optical indicators
Transmittance band: 560nm-1100nm
Minimum transmittance: T>94%
Central wavelength: 550nm±3
Cut-off band: 350nm-540nm
Cut-off depth: T<0.1% (customizable)
Surface finish: National standard level 3, US military standard 40-20 (scratches/pitting)
Spectrum
Application areas
Medical beauty equipment: For example, IPL (intense pulsed light) beauty laser hair removal equipment uses filters to selectively filter out unwanted wavelengths to ensure that only lasers with specific wavelengths can act on the target area.
Optical instruments: In scientific experiments such as spectral analysis, fluorescence detection, and Raman spectroscopy, filters are used to accurately control the wavelength range of the light source.
Lighting system: In lighting equipment such as white light LEDs, metal halide lamps, and fiber optic lighting, filters are used to adjust the spectral distribution of the light source to achieve specific lighting effects.
Environmental monitoring: In the fields of atmospheric pollutant monitoring and marine environmental monitoring, filters are used to selectively detect light signals of specific wavelengths.
| Curve data | |||||||
| wavelength | Transmittance T% | Wavelength nm | Transmittance T% | Wavelength nm | Transmittance T% | Wavelength nm | Transmittance T% |
| 0 | 0.00 | 430 | 0.03 | 660.00 | 94.97 | 890 | 95.76 |
| 0 | 0.00 | 440 | 0.01 | 670.00 | 95.07 | 900 | 95.52 |
| 0 | 0.00 | 450 | 0.01 | 680.00 | 95.53 | 910 | 95.41 |
| 0 | 0.00 | 460 | 0.08 | 690.00 | 95.31 | 920 | 95.53 |
| 0 | 0.00 | 470 | 0.05 | 700.00 | 94.89 | 930 | 95.80 |
| 0 | 0.00 | 480 | 0.07 | 710.00 | 94.99 | 940 | 95.94 |
| 0 | 0.00 | 490 | 0.07 | 720.00 | 95.44 | 950 | 95.98 |
| 0 | 0.00 | 500 | 0.06 | 730.00 | 95.45 | 960 | 95.78 |
| 0 | 0.00 | 510 | 0.06 | 740.00 | 95.24 | 970 | 95.47 |
| 0 | 0.00 | 520 | 0.07 | 750.00 | 95.35 | 980 | 95.23 |
| 0 | 0.00 | 530 | 0.16 | 760.00 | 95.71 | 990 | 95.20 |
| 0 | 0.00 | 540 | 1.78 | 770.00 | 95.95 | 1000 | 95.42 |
| 0 | 0.00 | 550 | 63.44 | 780.00 | 95.81 | 1010 | 95.72 |
| 0 | 0.00 | 560 | 95.37 | 790.00 | 95.65 | 1020 | 95.97 |
| 0 | 0.00 | 570 | 95.45 | 800.00 | 95.68 | 1030 | 96.05 |
| 350 | 0.04 | 580 | 95.57 | 810.00 | 95.88 | 1040 | 95.85 |
| 360 | 0.01 | 590 | 95.54 | 820.00 | 95.93 | 1050 | 95.63 |
| 370 | 0.03 | 600 | 95.68 | 830.00 | 95.80 | 1060 | 95.28 |
| 380 | 0.00 | 610 | 95.58 | 840.00 | 95.24 | 1070 | 95.07 |
| 390 | 0.01 | 620 | 95.77 | 850.00 | 95.57 | 1080 | 95.03 |
| 400 | 0.03 | 630 | 95.46 | 860.00 | 95.78 | 1090 | 95.12 |
| 410 | 0.03 | 640 | 95.42 | 870.00 | 95.95 | 1100 | 95.46 |
| 420 | 0.02 | 650 | 95.33 | 880.00 | 95.94 | N/A | N/A |
