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Built-in Illuminator

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Built-in Illuminator

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Built-in Illuminator

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Graphics window

Toolbar

  Built-in Illuminator

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Click to expand

 

The panel contains simulation parameters for the built-in illumination of the active camera. It is possible to simulate infrared illumination , visible light illumination and mixed illumination .

 

As in other panels, to change any parameter of illumination of all selected cameras at the same time: right-click on the box with the parameter and select Assign to selected cameras.

 

See also: Modeling Built-in IR illuminator

 

On / Off

 

Turns on and off the built-in illumination.

The enabled illumination will be simulated along with other illuminators in the 3D video window.

The calculated illumination zone will be displayed in the Graphics window, if the Draw on layout checkbox is checked.

 

Source/Wavelength (nm)

 

For IR illuminator here the IR radiation wavelength can be chosen. Emitters with short waves (~ 850nm) are more efficient with the same power consumed, but they are more noticeable in the dark.

Here you can also set visible light illumination (White LED ) and White+IR mixed illumination .

 

See more: IR illuminators

 

Radiation power (W)/Luminous flux (lm)

 

If the IR LED wavelength is selected in the Source/Wavelength (nm) box, then this box sets the total radiated optical power is specified. Radiated power is not equal to the consumed electrical power. About 6..40% of the electrical power goes into radiation in the optical range, most of electrical power goes into heat.

 

If the White LED or White+IR visible light source is selected in the Source/Wavelength (nm) box, then the luminous flux of the visible light source is set in this box.

 

See more: Light flux emitted by lamp (lumen)>Radiant power (watt)

 

Radiation angle (deg.)

 

Full angle at the top of the radiation cone. Optical power is radiated within this cone.

At the same power, a luminaire with smaller angle of radiation will create more illumination, but on smaller area.

 

See also: Angle of radiation (degree)

 

=Max. view angle

 

Assign the maximum view angle of the camera (horizontal or vertical) to the Radiation angle. The Radiation angle will change when the maximum view angle changes.

 

Concentration

 

The ratio of the radiation intensity at the edge of the radiation cone to the radiation intensity along the axis of the radiation cone

 

See also: Luminaire parameters>Concentration

 

Max distance

 

The maximum distance along the radiation axis at which an image of the target with acceptable quality can be obtained. The maximum distance can be simply assigned to the camera from the manufacturer's specification or calculated from the parameters of the built-in infrared illuminator (wavelength, power, angle of radiation, concentration), camera sensitivity and the specified image quality of the target at the maximum distance. The signal-to-noise ratio is used as a quality criterion.

 

Based on the Maximum distance, radiation angle and concentration, VideoCAD calculates the shape of the illumination zone and its projection, which can be drawn in the Graphics window.

 

To simulate the expected  image in the 3D Video window and calculate the maximum distance, the camera sensitivity parameters must be correctly set.

 

See more: Modeling Built-in IR illuminator

 

Calculate from, Signal/Noise (dB)

 

If the checkbox is checked, the maximum distance of the illumination will be automatically calculated from the parameters of the illuminator (wavelength, power, angle of radiation, concentration), camera sensitivity and the specified quality of displaying the target at the maximum distance. The signal-to-noise ratio from the Signal/Noise (dB) box is used as a quality criterion.

 

When the checkbox is not checked, you can enter the maximum distance directly. When changing the maximum distance, VideoCAD will calculate the expected signal-to-noise ratio of the image of the target located at the maximum distance and display the result in the Signal/Noise (dB) box.

 

When calculating the maximum distance and illumination zone, it is assumed that there are no other light sources other than the built-in illuminator, there is no reflected light, the target is human skin. There is no limitation of the camera exposure due to the illumination of other objects located closer to the camera (the target is the brightest subject in the frame).

 

Draw on layout

 

Draw the calculated illumination zone in the Graphics window. At the border of the illumination zone, the same quality of displaying an object located there is expected as at the maximum distance.

 

The horizontal projection of the illumination zone is displayed in the horizontal projection of the Graphics window.

The horizontal projection of the illumination zone is calculated according to the same rule as the horizontal projection of the view area:

 

A point on a horizontal projection is considered sufficiently illuminated if the vertical segment formed by this point in the range of heights from the view area lower bound to the the view area upper bound is fully illuminated.

 

Instead of the projection, it is possible to display separately the sections of the illumination zone with the lower and upper bounds of the view area, if you select on the Toolbar View area projection bounds> 2 levels. Or Shadow > 2 levels.

 

In the vertical projection of the Graphics window, the illumination zone of the active camera is displayed in the graphical editing state of the active camera.

 

The line type for displaying the boundaries of the illumination zone can be changed in the Options box.

 

If there are selected cameras on the plan, except for the active camera, then the checkbox changes color and controls the display of the illumination zones of all selected cameras simultaneously.

 

 

 

See also: Modeling Built-in IR illuminator