Dark field light

Updated on Mar 17, 2025
Published on Jul 4, 2024

3 minute(s) read

Mechanical dimensions

Setup

ID2 = A

reflector types-top light A_v01 — Focal length 60 mmWorking distance 50 mm – 70 mm

ID2 = B

reflector types-top light B_v01 — Focal length 95 mmWorking distance 70 mm – 120 mm

ID2 = C

reflector types-top light C_v01 — Focal length 190 mmWorking distance 120 mm – 300 mm

ID2 = D

reflector types-top light D_v01 — Parallel beamWorking distance > 300 mm

Special options, coaxial module

In addition to the configuration in Corona II Overview there are special options available.

The additional option will be set to the identification number as ID0:

CP000200-CXT-340C-04-2.5-B1B

The coaxial module is an extension to the Top light module and the Bright field module. Protection screens are provided with an anti-reflective (AR) coating with to avoid dust on the beam splitter.

NOTE - unwanted optical effects

Be aware that protection screens might cause optical effects.

ID0	Special option
CXN	Coaxial module No protection screen
CXN	170	340	510	680	850	1020	1190	1360
CXT	Coaxial module Protection screen top side
CXT	170	340	510	680	850	1020	1190	1360
CXB	Coaxial module Protection screen bottom side
CXB	170	340	510	680	850	1020	1190	1360
CXS	Coaxial module Two protection screens
CXS	170	340	510	680	850	1020	1190	1360
CH2	Cable with Hummel connector Length: 0.5 m or 1.0 m
CH2	170	340	510	680	850	1020	1190	1360
DW1	Drag chain cable with standard Würth connectors All standard lengths available
DW1	170	340	510	680	850	1020	1190	1360

Mechanical dimensions and setup

Illumination characteristics

The following graphic defines the coordinate system with focal length, working distance and working range of the illumination.

Lichtstrahl_xy-Achsen_1-3_v01 — Definition of coordinate system focal length, working distance, working range

The following graphic defines the coordinate system for the light distribution along the x-direction.

illuminance-definition coordinate system02_v01 — Definition coordinate system of light distribution along x-direction, colored dots as an example for different working distances

Conditions

The following conditions apply to the charts:

the curves represent cool white LED.
maximum current is 1.8 A.
simulations and measurements are performed with screen option 1 “glass low diffusion”.

Use the following correction factors for other screen options.

screen 1, 3

screen 2

screen 4, 7

screen B

glass or plexiglas

low diffusion

polarization

glass or plexiglas

medium diffusion

anisotropic foil

relative illuminance @ 100 mm

100 %

approx. 40 %

approx. 50 %

approx. 80 %

The detector planes are orientated parallel to the x-axis.

reflector type	focal length	recommended working distance
		from	to
A	60 mm	50 mm	70 mm
B	95 mm	70 mm	120 mm
C	190 mm	120 mm	300 mm
D	parallel	300 mm	∞

Reflector type A

corona_Lichtverteilung_Typ-A_Z-Achse_v01 — Maximum light intensities over working distance with focal length 60 mm

corona_Lichtverteilung_Typ-A_X-Achse_v01 — Illumination profile with focal length 60 mm – measured in the center of a 680 mm module

Reflector type B

corona_Lichtverteilung_Typ-B_Z-Achse_v01 — Maximum light intensities over working distance with focal length 95 mm

corona_Lichtverteilung_Typ-B_X-Achse_v01 — Illumination profile with focal length 95 mm – measured in the center of a 680 mm module

corona_Lichtverteilung_Typ-B_Y-Achse_v01 — Relative illuminance parallel to illumination unit – focal length 95 mm, module length 680 mm

Reflector type C

corona_Lichtverteilung_Typ-C_Z-Achse_v01 — Maximum light intensities over working distance with focal length 180 mm

corona_Lichtverteilung_Typ-C_X-Achse_v01 — Illumination profile with focal length 180 mm – measured in the center of a 680 mm module

corona_Lichtverteilung_Typ-C_Y-Achse_v01 — Relative illuminance parallel to illumination unit – focal length 180 mm, module length 680 mm

Reflector type D (parallel beam)

corona_Lichtverteilung_Typ-D_Z-Achse_v01 — Maximum light intensities over working distance parallel beam

corona_Lichtverteilung_Typ-D_X-Achse_v01 — Illumination profile parallel beam

corona_Lichtverteilung_Typ-D_Y-Achse_v02 — Relative illuminance parallel to illumination unit – parallel beam, module length 680 mm

Comparison of reflector types

corona_Lichtverteilung_A-B_v01 — Comparison light intensities reflector A – reflector B

corona_Lichtverteilung_B-C_v01 — Comparison light intensities reflector B – reflector C

corona_Lichtverteilung_C-D_v01 — Comparison light intensities reflector C – reflector D

Illuminance and irradiance

The illuminance and the irradiance on the target plane depends on the following parameters:

Reflector type
Operating current
LED temperature
LED type used in module
LED specimen

For all illuminance values the LED chip temperature TS is 90 °C. Depending on the cooling system installed, the illuminance values can be higher or lower than in the tables.

The LEDs are selected by brightness and color. There may be a differences in brightness between different modules, even if temperature and operating current are identical.

LED type 01 red

Reflector type	Illuminance [lux] min. @1.5 A	Irradiance [W/m²] min. @ 1.5 A	Y-distance to module-top-plane [mm]
A	2.200.000	12.500	60
B	670.000	3.800	90
C	330.000	1.900	120
D	230.000	1.300	50

LED type 02 green

Reflector type	Illuminance [lux] min. @1.5 A	Irradiance [W/m²] min. @ 1.5 A	Y-distance to module-top-plane [mm]
A	2.300.000	4.600	60
B	780.000	1.600	90
C	360.000	730	120
D	250.000	500	50

LED type 03 blue

Reflector type	Illuminance [lux] min. @1.5 A	Irradiance [W/m²] min. @ 1.5 A	Y-distance to module-top-plane [mm]
A	500.000	14.800	60
B	165.000	4850	90
C	77.000	2250	120
D	55.000	1600	50

LED type 04 standard white

Reflector type	Illuminance [lux] min. @1.8 A	Irradiance [W/m²] min. @ 1.8 A	Y-distance to module-top-plane [mm]
A	3.500.000	11.000	60
B	1.200.000	3.800	90
C	550.000	1.750	120
D	390.000	1.200	50

LED type 08 infrared 850 nm

Reflector type	Irradiance [W/m²] min. @ 1.8 A	Y-distance to module-top-plane [mm]
A	16.900	60
B	5.500	90
C	2.500	120
D	1.800	50

LED type 09 infrared 940 nm

Reflector type	Irradiance [W/m²] min. @ 1.8 A	Y-distance to module-top-plane [mm]
A	15.500	60
B	5.100	90
C	2.400	120
D	1.600	50

LED type 30 UV 365 nm

Reflector type	Irradiance [W/m²] min. @ 1.0 A	Y-distance to module-top-plane [mm]
A	11.600	60
B	4.000	90
C	1.800	120
D	850	50

LED type 33 UV 395 nm

Reflector type	Irradiance [W/m²] min. @ 1.0 A	Y-distance to module-top-plane [mm]
A	13.900	60
B	4.800	90
C	2.100	120
D	1.000	50

LED type 60 SWIR 1100 nm

Reflector type	Irradiance [W/m²] min. @ 1.0 A	Y-distance to module-top-plane [mm]
A		60
B		90
C		120
D		50

LED type 61 SWIR 1300 nm

Reflector type	Irradiance [W/m²] min. @ 1.0 A	Y-distance to module-top-plane [mm]
A		60
B		90
C		120
D		50

LED type 62 SWIR 1450 nm

Reflector type	Irradiance [W/m²] min. @ 1.0 A	Y-distance to module-top-plane [mm]
A		60
B		90
C		120
D		50

LED type 63 SWIR 1550 nm

Reflector type	Irradiance [W/m²] min. @ 1.0 A	Y-distance to module-top-plane [mm]
A		60
B		90
C		120
D		50

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