Knowledge

Spherical aberration is a type of monochromatic aberration for axial points, where rays at different angles intersect the optical axis at various points after passing through a lens, deviating from the ideal image point. In a spherical aberration curve, the vertical axis represents aperture, while the horizontal axis denotes spherical aberration (or chromatic spherical aberration).

Sensor size refers to the diagonal length of the sensing area on an industrial camera or image sensor that receives light signals, usually expressed in inches. However, the inch here is not the conventional definition of 1 inch equals 25.4 mm, but a historical standard, originally referring to the size of early camera tubes, approximately 16mm.

The continuous zoom lens works on the principle that the focal length of its optical system can be changed continuously within a certain range, and the image plane position remains unchanged during focal length adjustment. When it is not possible to change the focal power of the optical system directly, changes in focal length can only be achieved by adjusting the distance between each lens group, which is the fundamental principle of the zoom optical system.

Traditional infrared optical structures can be divided into three types: refractive, reflective, and catadioptric. Modern new infrared optical structures can be divided into three types: refractive-diffractive hybrid system, off-axis three-mirror system, and dual-FOV optical system.

The bore diameter of the mounting hole of the infrared lens (D) should be larger than the outer diameter of the lens (d), and generally, for optic lenses, D is larger than d by 0.4 mm. On special occasions where there is a high demand of coaxality or athermalized design of the lens, the size of the mounting hole should be determined according to specific situations. The gap between them is for easier installation, and some silica gel can be filled in the gap to keep the lens from damage.

Threads are indispensable elements within EO systems, especially infrared lenses, orchestrating seamless interaction among subsystems. Their efficient management enhances system responsiveness and real-time processing capabilities. Optimal thread utilization is paramount for ensuring the reliability and effectiveness of EO systems across diverse operational scenarios.

Infrared optical materials are typically classified into three main categories: infrared optical glass, infrared optical plastics, and infrared optical crystals.

This article will introduce several imaging phenomena that often occur in infrared imaging - bad pixels, ghost effect, and vignetting effect. And some methods to solve these defects are given, such as: non-uniformity correction, compensation, SDRAM and FLASH.

The advantage of infrared sensor engineering design plays an important role in the performance of the whole system. Infrared imaging technology with wavelengths ranging from 3 to 5 μm and 8 to 12 μm has always been the focus of the development of infrared imaging technology. Which of these two bands is superior in long-range detection? This issue has been under discussion since the 1970s, showing its importance.

Infrared sensor is one of the main functional units of infrared system. Its main task is to detect various dynamic and static targets, and transmit the detected target signals to infrared information and image processing unit for processing. So this article briefly introduces the working principle and composition of infrared sensor.

Infrared thermal imaging technology has gradually become a more mainstream technology in the past few decades. With the increasing popularity of handheld thermal imaging cameras, there is a growing awareness of the industrial benefits of this technology.

Infrared thermal imaging is an image formed by detecting infrared energy emitted by a person or object. Applications in security include fire monitoring, camouflage, and concealed target recognition, and other fields. The following is a detailed introduction for you.

Thermal imagers are widely used in many industries. This article introduces six elements of choosing infrared thermal imagers. Through this article, we hope to help your company find a high-quality infrared thermal imager that meets the needs of your applications.

While aberration graphs are good for providing an optical designer with a lens' performance, it is usually an objective criterion for the user or evaluator of the lens. The following article briefly describes the optical designer's method for determining the performance of an optical lens.