Knowledge

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.

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.

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 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.

Over the years, R&D experts have been keen to use thermal imaging cameras in a wide range of applications. However, not all thermal imaging cameras have the same quality features. Today, let's take a look at how to choose between cooled and uncooled thermal imaging cameras!

Thermal imaging technology is playing an important role in many fields, such as civil aviation, security, border defense and automation. This paper briefly introduces the basic elements and characteristics of infrared thermal imaging technology and then discusses in detail its application in seven fields.

With the development of infrared focal plane detection technology, new requirements have been put forward for the design of infrared imaging optical systems and the processing of optical components. This paper briefly describes the progress and prospects of three generations of infrared imaging optical systems.

With the development of diving technology, infrared diving technology has attracted more and more attention. This paper discusses the principle of infrared diving, analyzes the index requirements of instruments in infrared diving technology. Finally, the main key technologies are given.

Infrared dual-field systems are widely used in optoelectronic reconnaissance equipment. In this paper, according to the working characteristics of the dual-field infrared optical system, a set of optical lens focusing system based on DSP is designed.

In this paper, a visible light/infrared dual-band dual-field imaging optical system for panoramic aerial cameras is designed. The optical system has the advantages of compact structure, small volume, lightweight, and low cost.

This article describes an infrared (IR) zoom lens gadget designed to detect missile signatures at 8 to 13 Bin wavelengths.

In order to meet the requirements of the airborne photoelectric system for the miniaturization and light weight of the infrared thermal imager optical system, this paper adopts the combination of the front-end afocal expansion magnification lens and the rear-end continuous zoom optical system to achieve 22x continuous zoom from 30 to 660mm. optical system.

According to the index requirements and platform constraints of the instrument, Quanhom proposes a light, small, and compact catadioptric optical structure that simplifies the main optical form for the application of refrigeration detectors, which is suitable for mass-produced UAV optoelectronic pod long-wave infrared cameras.

In this article, for the 320×256 long-wave staring focal plane detector, a novel zoom mode is used, and a secondary imaging dual-field optical system is designed with only 5 lenses.

In this article, the theory and method of wavefront-encoded infrared imaging are studied, and several prototypes of wavefront-encoded infrared imaging systems are developed.

In this article, a long-wave infrared optical athermal lens is designed to meet the needs of large area array detectors, athermal design of high imaging quality and long-wave infrared lenses with medium and long focal lengths.

In this article, based on the 640×512 long-wave cooled infrared detector, which has been maturely applied, a dual-group linkage long-wave infrared continuous zoom optical system is designed.

In this article, a telephoto infrared folded system suitable for multi-mode guidance is designed.

Aiming at the high-resolution 640×512 element uncooled detector, this paper specifically introduces the process of designing a 6×long-wave infrared continuous zoom optical system.

In this article, Quanhom discusses the influence of the quality of optical components on the signal-to-noise ratio of infrared optical systems.

This article specifically shares a rapid detection method of infrared lens focal length based on knife-edge target images, which can achieve rapid and accurate measurement of infrared lens focal length in batches.