LS108H Spectrum Transmission Meter
LS108H Spectrum Transmission Meter
Optical transmittance testing for glass and thick transparent materials
The LS108H is a benchtop optical transmittance meter for glass, PC, PMMA, acrylic, coated glass, transparent plastics, coated materials, lenses and other uniform transparent samples. Its 1 mm test aperture supports visible-light, infrared and ultraviolet transmittance measurement for material quality control, incoming inspection, process comparison and optical transmission checks.
With a flat benchtop design for samples of different shapes and a parallel-light-path design, the LS108H can be evaluated for thicker materials. Compared with the LS108A and LS108D, which focus on IR holes and small apertures in mobile-phone lenses, the LS108H is better suited to thicker materials, larger transparent areas and multi-band transmission checks. Confirm suitability based on sample thickness, material, surface condition, wavelength band, measurement location and quality-control requirements.
Measurement Principle
Ultraviolet, infrared and visible light sources illuminate the transparent sample. The sensors measure incident light intensity and the intensity transmitted through the sample. Transmittance is calculated as transmitted intensity divided by incident intensity and displayed as a percentage, helping compare the optical transmission of different materials, thicknesses or production batches.
| Specification | Details |
|---|---|
| Model | LS108H Spectrum Transmission Meter |
| UV peak wavelength | 365 nm |
| IR peak wavelength | 940 nm |
| Visible light | Full-band 380–760 nm; conforms to the CIE photopic luminous efficiency function |
| Resolution | 0.1% |
| Measurement accuracy | ±2% (for colorless, uniform light-transmitting materials at 0–90% transmittance) |
| Minimum test object size | Φ1 mm |
| Instrument dimensions | L 170 × W 180 × H 144 mm |
| Instrument weight | Approx. 1570 g |
| Power input | DC 5 V / 1 A |
| Notes | Designed for UV, IR and visible-light transmittance testing of glass, PC, PMMA, acrylic, coated glass, transparent plastics and thicker transparent samples. Specifications may be updated; please refer to the manufacturer or Fulcrum Technology product page for current information. Confirm suitability based on sample thickness, material, wavelength band, surface condition and quality-control requirements. |
LS108H Introduction Video
Optical transmittance measurement demonstration for thick transparent materials
This video provides an introduction to the LS108H spectrum transmission meter. It is suitable for visible, UV and IR transmittance testing of glass, PC, PMMA, acrylic, coated glass and thicker transparent materials. Confirm application suitability based on sample thickness, material, wavelength band and quality-control requirements.
Related Products
Measure blue light at 430 nm, violet light at 395 nm, and visible-light transmittance from 380–760 nm. The LS108 evaluates blue-light blocking and optical transmittance of lenses, coatings, screens, and optical materials. Minimum test spot: Φ1 mm. Contact our team to confirm the suitable configuration and test method.
The LS108A Lens Transmittance Meter is designed to test transmittance in mobile phone cover-glass IR ink openings, remote-control windows, IR-cut filters, infrared-technology products, screen protectors and lens materials. Its three-in-one optical path measures transmittance at 550 nm visible light, 850 nm infrared and 940 nm infrared with one alignment. The 1 mm measuring aperture is suitable for samples larger than 1 mm. The meter supports incoming inspection of optical components, process quality control, batch comparison and pre-shipment checks.
Contact our team to confirm the configuration and measurement conditions for your sample.
The LS108D lens transmittance meter is designed to test infrared transmittance through IR-ink openings in phone cover glass, very small light-transmitting apertures, remote-control windows, IR-cut filters, screen protectors, and lens materials. Compared with the LS108A 1 mm measuring aperture, the LS108D features a 0.5 mm micro-aperture for testing smaller openings or areas with limited measurement space. Confirm the model according to sample aperture, positioning method, test wavelengths, and quality-control workflow.
Contact our team to confirm the suitable test setup for your sample.
The LS152 monitors coating thickness and uniformity on thin-film production lines by measuring optical transmittance and optical density (OD). System configuration and calibration criteria depend on the coating and production setup; contact our team to discuss your application.