## Overview of the E39-R10 The **E39-R10** is a specific optical accessory manufactured by **Omron**. Technically, it is not an active electronic component (like a sensor or a motor) but rather a **Passive Retroreflective Reflector**. It is designed to work in conjunction with retroreflective photoelectric sensors to complete an optical circuit. --- ### Technical Specifications The following table outlines the physical and optical characteristics of the E39-R10: | Feature | Specification | | :--- | :--- | | **Type** | Retroreflective Reflector | | **Material** | Acrylic (Surface) / ABS (Backing) | | **Shape** | Rectangular | | **Dimensions** | 59.9 mm x 40.3 mm x 7.5 mm | | **Reflective Surface** | 56.6 mm x 37 mm | | **Mounting** | Two M3 screw holes | | **Ambient Temperature** | -25°C to 55°C | --- ### How it Works (Optical Principles) While the E39-R10 has no internal wiring or power requirements, its "electronic" utility comes from its **Corner Cube** structure: 1. **Retroreflection:** The surface is comprised of tiny micro-prisms (corner cubes). When light from a sensor hits these prisms, it is reflected back exactly 180 degrees to the source, regardless of the angle of incidence. 2. **Polarization:** It is compatible with **MSR (Mirror Surface Rejection)** sensors. The reflector changes the phase/polarization of the light, allowing the sensor to distinguish between the reflector and a shiny object (like a soda can). 3. **Sensing Distance:** The E39-R10 is considered a "Standard" reflector. The detection range of a sensor (e.g., Omron E3Z series) is usually calibrated based on this specific model. --- ### Compatibility and Usage The E39-R10 is the default reflector for many industrial photoelectric sensors. #### Compatible Sensor Series: * **Omron E3Z-R:** General-purpose compact sensors. * **Omron E3J:** Built-in power supply sensors. * **Omron E3AS:** Distance-settable/Reflective models. #### Installation Notes: * **Alignment:** The reflector must be placed directly opposite the sensor's light beam. * **Maintenance:** Since it is an optical part, the surface must be kept clean. Dust or oil film will degrade the signal strength returned to the sensor electronics. * **Mounting:** Ensure the M3 screws are not over-tightened to avoid cracking the acrylic housing.