EV3000 Range, Resolution and FOV Calculator

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Range, Resolution and FOV of EV3000-D-IR

Thermal Imager 640x480 with 500mm or lens 750mm or 1100mm

Day Camera with Fog Filter with 500/1000mm, 660-1680mm, 825mm, or 1000/2000mm lens optical zoom up to 100X

EV3000-D-IR Thermal Camera Information

EV3000-D-IR Pan/Tilt Housing Information

Links

Terms and Conditions	Information about Export License and other terms and conditions
Video Demo 1000/2000mm	Demo
Video Demo IR 500mm	Thermal Camera Demo
Video Demo 660-1680mm with Fog Filter	Demo
Power Points	EV3000 Dual sensor with IR 750mm
Download	Technical Data-Sheets
EV3000-D-IR range calculator	Thermal camera hi resolution 640x480 working on 3-5 micron
Prices	2010 Price

EV3000-D-IR Thermal Camera

IR Camera specification

Camera

Model EV3000-D-IR250 EV3000-D-IR500 EV3000-D-IR750 EV3000-D-IR1100

Pixel pitch (µm)

H (µm)

V (µm)

Number of Pixels

H-pixels

V-pixels

Detector Size (mm)

H-size

V-size

9.60

7.68

Field of View

Lens focal length

Enter 250 for EV3000-D-IR250

Enter 500 for EV3000-D-IR500 default

Enter 750 for EV3000-D-IR750

Enter 1100 for EV3000-D-IR1100

Field of View (FOV) (degrees) °

H-FOV

V-FOV

D-FOV

0.73

0.58

0.93

Pixel Field of View (IFOV) (mrad)

H-FOV

V-FOV

0.03

Calculate Field Of View at specific Range

Range to object

meters

Enter range and click here

Field of View at Range (meters)

H-IFOV

V-IFOV

13.00

11.00

This represent target size at Range to be in 100% of Monitor

Example if we have target 96x72 meters it will fill monitor at 5 km range

Pixel Field of View at Range (cm)

H-IFOV

V-IFOV

4.06

4.29

Range

H-Size of object

meters

Enter target size and click here

Max Detection Range (4 pixels)
% of display

Range (meters)

% of H display

5000.00

0.62%

Max Recognition Range (16 pixels)
% of display

Range (meters)

% of H display

1250.00

2.50%

Max Identification Range(26 pixels)% of display

Range (meters)

% of H display

769.23

4.06%

Description and Historical Information

This Calculator enables the user to easily estimate the maximum range from which an object can be detected when using various infrared camera platforms. It is important to note that these estimates assume that range performance is based solely on image quality yielding a method of estimation that's simple to implement. The estimates are based solely on the object size, distance, camera objective lens and camera detector parameters. Object temperature, emissivity, atmospheric conditions, reflectivity and other factors are not considered. In this regard, the object size and focal length of the objective lens are variables to be entered by the user. The spreadsheet also provides information as to the angular and spatial field-of-view of different camera systems at a specified range.

The calculations used here are based on the "Johnson Criteria" which were developed many years ago by John Johnson, a scientist at the US Army Night Vision Lab (Night Vision & Electronic Sensors Directorate). Johnson was working to develop methods of predicting target detection, recognition, and identification. He was working with volunteer observers using image intensifier equipment and quantified the volunteer observer's ability to identify scale model targets under various conditions. His experiments produced the first empirical data on perceptual thresholds. The so-called Johnson Criteria have been the basis for many models that predict the performance of sensor systems under different environmental and operational conditions. According to the Johnson Criteria, the minimum resolution (pixels on target) required to achieve a 50% probability that an observer can discriminate an object at a certain range to the specified level are:

Detection - an object is present: 4 pixels
Recognition - the type object can be discerned, a person vs. a car: 16 pixels
Identification - a specific object can be discerned, a woman vs. a man, the specific car: 26 pixels

Disclaimer: We have made every attempt to provide accurate information. However, we cannot accept any responsibility for errors or inaccuracies. Should you require assistance, please contact us directly. Thank you.

Note: modified from electrophysics version by double criteria to be close to real application.

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