HOA0825-003

Optical Sensors - Photointerrupters - Slot Type - Transistor Output: HOA0825-003 Application Field and Working Principle

HOA0825-003 series by Sharp are devices that utilize the features of a slot type photointerrupter, the name of which means that it functions as an interrupter of light. This series includes several kinds of slot type photointerrupter ICs that have a transistor output circuit. It becomes superior in sensitivity when compared to devices with the Darlington output. The HOA0825-003 is a miniaturized device that can be integrated into a package, thus it can be used in flat-panel displays, copiers, and industrial and office automation equipment.

The working principle of the HOA0825-003 is pretty simple. Specifically, the unit contains an emitter that emits infrared light, and a receiver element that measures the intensity of the incident IR light and then outputs the relative strength using a digital pulse. The receiver is placed in the slot below the emitter, so that when the emitter beam is blocked or interrupted, the receiver’s output voltage drops, generating a digital pulse. This digital pulse is then used to activate the transistor.

The HOA0825-003 is a versatile device with many uses. It is used for general position sensing, alignment control, pattern inspection, and authentication systems. It is also widely used in motion control systems, paper path control systems, and in inkjet printing systems. The device is also popularly used in medical equipment and instruments, as well as in various types of cameras and camcorders. It is highly reliable, and has a small package size, making it ideal for integration into circuits.

The HOA0825-003 is composed of three main elements: the LED, Photo transistor, and Transistor Output amplifier. The LED is responsible for emitting the initial infrared light beam, which is then received by the Photo transistor. The Photo transistor is then responsible for detecting the incident IR light and outputting the relative strength in the form of a digital pulse. Finally, the Transistor Output amplifier is responsible for amplifying this digital pulse and activating the transistor when the beam is interrupted.

The HOA0825-003 also has two distinct operation modes. The user can choose either the NL (Non Latching) mode or the L (Latching) mode, depending on the application. In NL mode, the output is deactivated once the IR beam is interrupted. In the L mode however, the output remains active even after the beam is interrupted, until either the transistor is powered off or the mode is changed to NL.

The unit is also designed with features such as a quick response time and wide protection range. It has a response time of 25 microseconds, making it ideal for detecting high speed movement. It also has a wide protection range, meaning that it can detect light in an area of up to 2.75mm, allowing it to accurately detect motion of objects or changes in the environment in a wide range of distances.

Overall, the HOA0825-003 slot type photointerrupter is a highly reliable and versatile device. It can be used in a variety of applications and is designed with features such as quick response time and wide protection range, making it an ideal choice for accuracy and reliable performance.