光学式 refers to optical methods that utilize light to perform various functions, such as measurement, detection, or imaging. This approach is commonly used in devices like 光学式传感器 (optical sensors) and 光学显微镜 (optical microscopes), which rely on the properties of light to gather information about objects or environments. In many applications, 光学式 techniques can provide high precision and resolution. For instance, in 光谱分析 (spectral analysis), light is used to identify materials based on their unique spectral signatures. This makes 光学式 methods valuable in fields like 医学 (medicine), 材料科学 (materials science), and 环境监测 (environmental monitoring).