Equipments
/Optics
Understanding Optical Wavelength Meters
Explore the functionality of optical wavelength meters, focusing on Yokogawa's AQ6150 and other vendors in the optical measurement market.
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Table of Contents
This page provides an overview of optical thickness gauges, which are used for optical thickness measurement. We’ll explore its benefits and features of optical thickness gauges from various vendors.
Definition: An optical thickness gauge is a device or equipment used for measuring optical thickness.

The following table outlines the key features of the Optical Thickness Gauge 157 series from Bristol Instruments. It’s known for its reliable accuracy and long-term repeatability. This gauge utilizes non-contact optical interferometry for optical thickness measurement.
| Specifications | Optical Thickness Gauge |
|---|---|
| Accuracy | +/- 0.1 µm |
| Repeatability | +/- 0.02 µm |
| Range of Measurement | 25 µm to 16 mm |
| Probe Distance | Working distance of 50 mm and angular tolerance of 2 degrees |
| Rate of Measurement | 20Hz |
Here are some other popular Optical Thickness Gauge vendors:
Following are some of the advantages of optical thickness gauge.
An Optical Thickness Gauge is a game changer in industries where precision, efficiency and non destructive testing (NDT) are critical. It’s ability to measure ultra thin films with high accuracy enhances quality control, manufacturing consistency, and cost efficiency across sectors like optics, semiconductors, and biomedical research. As industries move towards miniaturization and high performance coatings, the Optical Thickness Gauge remains an indispensable tool for innovation and quality assurance.
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