Contact Lens Spectral Transmittance Measuring Instrument
The Contact Lens Spectral Transmittance Measuring Instrument is designed to measure the spectral transmittance of contact lenses across the ultraviolet and visible wavelength ranges. It provides quantitative data for evaluating the optical transmission characteristics of finished contact lenses and supports product development, quality inspection, and laboratory testing.
The instrument is equipped with contact lens-specific measurement hardware and software, making it suitable for soft contact lenses, including hydrogel and silicone hydrogel lenses, as well as rigid gas-permeable (RGP) and orthokeratology (Ortho-K) lenses.
A built-in integrating sphere helps collect transmitted light for more reliable optical measurements. The specialized lens holder is designed to secure soft and rigid contact lenses while minimizing deformation during testing. The instrument supports measurements in air or in a liquid medium, including pure water and standard saline solution.
Application
(1) Soft hydrogel contact lenses.
(2) Silicone hydrogel contact lenses.
(3) Rigid gas-permeable (RGP) contact lenses.
(4) Orthokeratology (Ortho-K) lenses.
(5) Spectral transmittance evaluation of finished contact lenses.
(6) Contact lens optical performance research and development.
(7) Medical optical product inspection and quality control.
Standards
GB/T 11417.5-2012 — Ophthalmic Optics — Contact Lenses — Part 5: Testing Methods for Optical Properties
ISO 18369-3:2017 — Ophthalmic Optics — Contact Lenses — Part 3: Measurement Methods
ANSI Z80.20-2016 (R2021) — American National Standard for Ophthalmics — Contact Lenses — Standard Terminology, Tolerances, Measurements and Physicochemical Properties
Parameters
| Parameter | Specification |
|---|---|
| Measurement medium | Air or liquid, including pure water and standard saline solution |
| Measuring aperture | 6 mm |
| Maximum lens diameter | 18 mm |
| Wavelength range | 280–780 nm |
| Transmittance measurement repeatability | <1.0%, as specified |
| Absolute transmittance error | <1.0%, as specified |
| Wavelength interval | Adjustable from 1 to 10 nm |
| Default wavelength interval | 5 nm |
| Dimensions (W × D × H) | 600 × 440 × 190 mm |
| Weight | Approximately 26.5 kg |
| Power supply | AC 100–220 V, 50 Hz |
| Power consumption | 150 W |
| Operating system | Windows 7, 8, 10, and 11 |
| Data interface | USB |
Features
(1) Measures contact lens spectral transmittance over a wavelength range of 280–780 nm.
(2) Supports measurements in air, pure water, and standard saline solution.
(3) Features a built-in integrating sphere for optical transmission measurements.
(4) Includes specialized hardware and software for contact lens testing.
(5) Accommodates soft and rigid contact lenses with a maximum diameter of 18 mm.
(6) Uses a dedicated lens holder designed to minimize specimen deformation during measurement.
(7) Offers adjustable wavelength intervals from 1 to 10 nm, with a default setting of 5 nm.
(8) Supports measurement repeatability and absolute transmittance error below 1.0%, as specified.
(9) Provides USB data communication for measurement data transfer.
(10) Supports optical performance evaluation and quality control of contact lenses.
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