What Is an Optical Sensor?
An optical sensor is a sensor that measures based on optical principles. It has many advantages, such as non-contact and non-destructive measurement, almost no interference, high-speed transmission, and remote measurement and remote control.
Optical sensor
- Chinese name
- An optical sensor is a sensor that measures based on optical principles. It has many advantages, such as non-contact and non-destructive measurement, almost no interference, high-speed transmission, and remote measurement and remote control.
- It mainly includes optical sensors and instruments such as general optical measuring instruments, laser interference, gratings, encoders, and fiber optics. It is mainly designed to detect the presence of targets, or to perform motion detection in various industrial, automotive, electronic products and retail automation.
- A finger is pressed on one side of the glass plane, and an LED light source and a CCD camera are installed on the other side of the glass. The light beam emitted by the LED is irradiated to the glass at a certain angle. The camera is used to receive the light reflected from the glass surface. The ridge line on the finger is in contact with the glass surface, and the valley line is not in contact with the glass surface. Therefore, the light shining on the glass surface of the part where the fingerprint ridge line touches is diffusely reflected, and the light shining on the glass surface corresponding to the fingerprint valley line It is totally reflected, so in the image captured by the CCD camera, the part corresponding to the fingerprint ridge line is darker and the part corresponding to the fingerprint valley line is lighter. [1]
- 1. Adopt low-power architecture [2]
- The optical sensors mainly include: optical image sensors, transmissive optical sensors, optical measurement sensors, optical mouse sensors, reflective optical sensors, and the like.
- Uses: Optical sensors are widely used in aerospace, aviation, national defense research, information industry, machinery, electric power, energy, transportation, metallurgy, petroleum, construction, post and telecommunications, biology, medicine, environmental protection and other fields.