The **M3E16ZQD-R** is a high-performance optical lens component, specifically an **auto-iris, motorized zoom, and focus lens** designed for industrial and security imaging systems. It is part of the Computar (CBC Group) lineup, typically used with 1/1.8" or 2/3" sensor formats. --- ### 1. Key Electronic Components & Functions The "electronic" aspect of this lens refers to the actuators and control interfaces that allow a computer or camera controller to manipulate the optics. | Component | Function | Technical Detail | | :--- | :--- | :--- | | **Zoom Motor** | Adjusts focal length | Stepper motor controlled via pulses for precise positioning. | | **Focus Motor** | Adjusts image sharpness | Motorized movement of the focus group for remote calibration. | | **Auto-Iris (DC)** | Regulates light intake | A DC-driven galvanometer that opens/closes the aperture based on light levels. | | **Potentiometers** | Position Feedback | Provides resistance-based feedback to the controller to know the exact position of zoom/focus. | | **Connector Interface** | Electrical Link | Standard 4-pin or multi-pin connectors for power and control signals. | ### 2. Technical Specifications The electronics support the following optical parameters through mechanical movement: * **Focal Length:** 16mm – 160mm (10x Optical Zoom). * **Iris Type:** DC Auto Iris (controlled by the camera's processing engine). * **Voltage Requirement:** Typically operates on 6V - 12V DC for the motors. * **Mount Type:** C-Mount (standard threaded interface with electrical pigtails). ### 3. Electronic Control Logic To operate the M3E16ZQD-R, the following signal logic is used: 1. **Iris Control:** The camera sends a low-voltage DC signal to the drive coil. The damping coil provides feedback to prevent the iris from hunting (oscillating). 2. **Motorized Zoom/Focus:** These are usually "Polarity Reversal" motors. * **Forward Polarity:** Moves the lens element toward the Telephoto/Near position. * **Reverse Polarity:** Moves the lens element toward the Wide/Far position. 3. **Preset Capability:** Because it includes **Presettable (ZQD)** electronics, it contains internal potentiometers. This allows the user to save specific zoom/focus coordinates and return to them automatically. ### 4. Wiring Overview (Typical) Most models in this series follow a standardized wiring color code for the 4-pin or 6-pin leads: ```yaml Iris Control: - Pin 1: Damping Coil (-) - Pin 2: Damping Coil (+) - Pin 3: Drive Coil (+) - Pin 4: Drive Coil (-) Motor Control (Zoom/Focus): - Zoom: +/- (Voltage defines direction) - Focus: +/- (Voltage defines direction) - Potentiometer: Vcc, Signal, Ground (for presets) ``` ---