LS108A Lens Transmittance Meter | IR and Screen Protector Testing
LS108A Lens Transmittance Meter
Test IR ink openings in phone cover glass, remote-control windows and infrared transmittance
The LS108A Lens Transmittance Meter is designed to measure transmittance in infrared-technology products. Typical applications include IR-ink openings in mobile-phone cover glass, remote-control windows, IR-cut filters, screen protectors and other optical components whose infrared transmission needs to be verified. The measuring aperture is 1 mm; confirm suitability based on sample size, opening dimensions and measurement location.
With its three-in-one optical path, the LS108A measures transmittance at 550 nm visible light, 850 nm infrared and 940 nm infrared with one alignment. It supports incoming inspection, in-process quality control, batch comparison and pre-shipment checks. Confirm the configuration for the sample dimensions, material thickness, surface condition, test wavelengths and quality-control process.
Measurement principle
The LS108A illuminates a transparent sample with 850 nm infrared, 940 nm infrared and 550 nm visible-light sources. Its sensor detects the incident light intensity and the light intensity transmitted through the sample. Transmittance is calculated as transmitted-light intensity divided by incident-light intensity and displayed as a percentage. This supports quick comparisons between batches, opening locations and optical materials.
Contact our team to confirm the configuration and measurement conditions for your sample.
| Parameter | Value |
| Product model | LS108A Lens Transmittance Meter |
| Measurement beam diameter | Φ1 mm |
| Infrared | Two peak wavelengths: 850 nm and 940 nm |
| Visible light | Peak wavelength: 550 nm |
| Resolution | 0.1% |
| Measurement accuracy | ±2% for colorless, uniform transparent materials with 0–90% transmittance |
| Weight | Approx. 1570 g |
| Dimensions | 170 × 180 × 144 mm |
| Power input | DC 5 V / 1 A |
| Notes | The LS108A is primarily suited to transmittance testing of IR-ink openings in phone lenses, remote-control windows, IR-cut filters, screen protectors and infrared-technology products at 550 nm, 850 nm and 940 nm. For updated specifications, refer to the manufacturer or Fulcrum Technology product page. Confirm suitability for the sample dimensions, opening size, test wavelengths, material thickness and quality-control process. |
LS108A video introduction
Lens transmittance meter and IR-opening test demonstration
This video provides an overview of operating the LS108A Lens Transmittance Meter and its measurement workflow. The LS108A tests transmittance at 550 nm, 850 nm and 940 nm for IR-ink openings in phone lenses, remote-control windows, IR-cut filters, screen protectors and infrared-technology products. Confirm suitability for the sample size, opening dimensions, test wavelengths and quality-control process.
LS108A／LS108D operation videos
Lens and micro-opening transmittance measurement demonstration
Both the LS108A and LS108D measure transmittance through lenses, screen protectors and IR openings. For smaller openings or restricted measurement positions, learn more about the LS108D Lens Transmittance Meter. Select a model based on opening diameter, sample positioning and test wavelengths.
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 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.