20km Long Range Surveillance Thermal Camera 80~800mm

• Pixels: 640X512
• Spectral Band: 3~5um
• Focus Length: 80~800mm Continuous Zoom
• Dimension: 460mmx230mmx325mm
• Power Supply: 24~30VDC
• Detection Range: 20km (2.3mx2.3m Vehicle)
• Model NO.: JH640-800
• Command and Control: RS422 or RS232
• Features: Waterproof, High Sensitivity
• Frame Frequency: 25Hz/30Hz
• Transport Package: Standard Packing
• Specification: GJB
• Trademark: JOHO
• Origin: China Wuhan
• HS Code: 9031499090
• Production Capacity: 100PCS/Year

Product Description

  20km Long Range Surveillance Thermal Camera 80~800mm 

1 Introduction

1.1 Principle

The common camera is an equipment of visible imaging. Its image-forming principle is based on the difference between reflect and reflectance on the target surface. But the infrared thermal camera is different totally, it utilized the thermal contrast difference between targets and surrounding environmental conditions to forming the thermal radiation energy density images, we call it as "thermal imaging". As same as light wave and radio wave, the infrared radiation is a kind of electromagnetic wave. The wave band diagram refers to Figure 1.

 

Figure 1 Infrared wave band diagram

Because the human vision is not sensitive to infrared light, the thermal camera have to transform the infrared light to visible light and change the infrared image to visible image. As shown Figure 2, the function of transformer consists of 2 steps. Firstly, through the infrared thermal detector to transform the thermal radiations into electrical signals, which amplitude can reflect the strength of thermal radiation; Secondly, to display the electrical signals on monitor and get the visible infrared thermal image.

 

Figure 2 Principle of infrared imaging

JH640-800 long range surveillance thermal camera utilizes third generation HgCdTe 640x512 MWIR focal plane arrays (FPA) detector. The detector transform the target thermal radiations to electrical signals, after the process of a detailed analysis of electrical signals on image processing circuit boards, detector output analog and digital video signals together; the host PC control the thermal camera via RS232 communication interface. The basic principle diagram refers to Figure 3.

Figure 3 Principle of thermal camera

1.2 Features

JH640-800 long range surveillance thermal camera  is a matured and high reliability product which developed by our company independently. To ensure the thermal camera can totally meet the strict standard, we choose high-quality material and adopt top-ranking manufacture technology. Now the thermal camera has widely applied in the fields of aerospace, border & coast defense and city safety surveillance. This high-tech cooled infrared thermal camera is desperate needed in all-weather target detection, recognition and pre-warning system.

The thermal camera has advantages of small size, high sensitivity, easy to control, long surveillance range, continuous zoom (focal length is 80~800mm, the complete focusing movement time is not more than 6s), all weather operations, and good integration. It can be used as a single machine for monitoring, also can be integrated in the electro-optical pod used as forward looking infrared (FLIR) component.

Technical Specifications

Detector Parameters
Detector type	Cooled FPA HgCdTe
Pixels	640×512, 15μm×15μm
Spectral Range	3.7μm~4.8μm
NETD	≤25mK
Cooling	≤8min at 20ºC
Optics Parameters
Focus Length	80~800mm continuous zoom F#:4
FOV	6.87°×5.50°~0.69°×0.55°
Image Presentation
Video output	PAL/NTSC
Frame frequency	25Hz/30Hz
Brightness & Contrast	Auto/Manual
Polarity	BH&WH
Interfaces
Command and control	RS422 or RS232
Power Parameters
Power supply	24~30VDC
Power consumption	≤25w
Environmental Parameters
Operating temperature	-40ºC~+60ºC
Storage temperature	-50ºC~+70ºC
Vibration proof	GJB150.16-86
Shock proof	GJB 150.18-96
High temperature test	GJB150.3-86
Low temperature test	GJB150.4-86
Physical Parameters
Weight	≤20kg
Size	460mm(L)*230mm(lens diameter)*325mm(width)
Color	oxide black
Range Performance
Detection range	20km (2.3m*2.3m vehicle)

Company Profile
Wuhan JOHO Technology Co., Ltd founded in 2009, is a high-technology company based on infrared thermal imaging technology. Joho has built a complete infrared industrial chain from the bottom up: from core component to comprehensive electro optical infrared surveillance and tracking system.We have two R & D base in Hubei Zhongxiang and Wuhan City, well-known institutions of higher learning and research institutions at home and abroad.
Customer Distribution
Service Process
Products
Our products includes thermal security cameras, electro-optics/infrared search and track system (EO/IR search and track system) and EO surveillance system, surveillance radar, laser range finder, fiber optical gyro, special power sources (thermal battery and silver-zinc battery Ag-zn battery) and OEM solutions,Personalized products and services to provide customers with a significant advantage. Due to the high quality of our products and reliable performance, Joho products are widely used in different applications, security and surveillance, law enforcement, maritime patrol, fishery administration, surveying and mapping and so on.
Advantages
Certificate & Honor