Views: 11 Author: Site Editor Publish Time: 2025-03-21 Origin: Site
| No. | Parameter Name | Description |
| Optical Parameters | ||
| 1 | Focal Length (Effective Focal Length & EFL) | The distance from the optical center of the lens to the imaging plane (e.g., sensor). It describes the optical system’s ability to gather light and is commonly used to calculate the magnification factor. |
| 2 | Front Focal Length (FFL) | The distance from the foremost optical surface of the lens (e.g., the front surface of the first lens element) to the front focal point. |
| 3 | Back Focal Length (BFL) | The distance from the rearmost optical surface of the lens (e.g., the physical end of the last lens element) to the back focal point. |
| 4 | F-Number (F/#) | The ratio of the lens focal length to the diameter of the aperture. The smaller the F-number, the larger the aperture, the greater the ability to gather light. |
| 5 | Working Distance (WD) | The distance between the optical system (e.g., lens or sensor) and the observed or measured object (object distance). |
| 6 | Back Working Distance (BWD) | The distance from the plane of the rearmost end of the mechanical part to the focal plane. |
| 7 | Spectral Range | The range of wavelengths of light that can be effectively transmitted or processed by the lens. |
| 8 | Field of View (FOV) | The observable angles of an optical instrument, typically divided into horizontal field of view and vertical field of view. |
| 9 | Modulation Transfer Function (MTF) | A key metric for evaluating the imaging quality of the lens, measuring the system’s ability to transfer contrast at different spatial frequencies (resolution). |
| 10 | Distortion | Image distortion occurs due to lens manufacturing precision and assembly tolerances, leading to image deformation. Lens distortion includes radial distortion and tangential distortion. |
| 11 | Optical Axis Alignment | The alignment of the optical axis of an optical system, which refers to the coincidence of the optical centers of all optical surfaces with the reference axis (e.g., the centerline of the lens barrel). |
| 12 | Parfocality | The focus distance (starting from the imaging plane) depends only on the position of the focusing group and remains unaffected by zooming. |
| Mechanical Parameters | ||
| 1 | Pixel Size | The physical size of an individual pixel on a digital sensor, typically measured in micrometers(μm). It determines the resolution and sensitivity of the sensor. |
| 2 | Lens Size | The overall physical dimensions of the lens, typically including length, width, and height. |
| 3 | Maximum Diameter (Lens + Flange) | The largest external diameter of the lens, including the lens itself and the flange (mounting) components. It influences the lens's ability to gather light and the overall size of the optical system. |
| 4 | Lens Weight | The total weight of the lens assembly, including the lens elements, housing, and other mechanical components. |
| 5 | Total Lens Length | The overall mechanical length of the lens, measured from the end of the lens barrel to the image plane. |
| Interface & Data Output | ||
| 1 | Video Output Interface | The connection type or port used to transmit the optical system’s video signal to an external display or processing unit. |
| 2 | Communication Interface | The connection type or protocol used for communication between the optical system and other devices. |
| 3 | Frame Rate | The frequency (rate) at which successive bitmap images appear on a display, measured in frames per second (fps). |
| Performance Algorithms | ||
| 1 | Noise Equivalent Temperature Difference (NETD) | The value of the signal-to-noise ratio for the temperature difference. |
| 2 | Minimum Resolvable Temperature Difference (MRTD) | The smallest temperature difference that can be resolved at a given spatial frequency. |
| 3 | Non-uniformity Correction (NUC) | A key technology in infrared imaging systems used to correct non-uniform pixel response in the infrared focal plane array (FPA), eliminating brightness or temperature distribution inconsistencies in the image. |
| 4 | Digital Noise Reduction (DNR) | A widely used technology in digital signal processing that aims to remove noise from signals while preserving useful information. |
| 5 | Target Detection & Tracking | Algorithms used to detect and track specific objects or targets within an image or video stream. |
| 6 | Pseudo-color | It is derived from a grayscale image by mapping each intensity value to a color according to a table or function. |
| 7 | Image Fusion | The process of combining information from multiple images into a single enhanced image that retains critical information and features from the original inputs. Image fusion technology improves image quality and information content. |
| 8 | Temperature Measurement | A non-contact method for measuring the surface temperature of an object by detecting its infrared radiation. |
| 9 | AI Face Detection | The automatic identification and recognition of human faces in images using computational analysis. |
| 10 | General Behavior Analysis | A systematic approach to studying, quantifying, and interpreting behavioral patterns of individuals or groups, widely applied in business, psychology, artificial intelligence, security, and healthcare. The core objective is to extract behavioral rules from large datasets, predict future trends, and optimize decision-making. |
| Environmental Requirements | ||
| 1 | Operating Temperature | The temperature range within which the optical system or equipment can function effectively. |
| 2 | Storage Temperature | The temperature range within which the optical system or components should be stored when not in use. |
| 3 | Vibration Resistance | The system’s ability to withstand vibrations, including structural integrity and fatigue characteristics. |
| 4 | Shock Resistance | The system’s ability to withstand impacts, considering material brittleness and toughness. |
| 5 | Humidity & Corrosion Resistance (Acid/Alkali Environments) | The system’s tolerance to environmental humidity and acidic/alkaline conditions. |
