Optical Filter Solutions for
Machine Vision & Robotic Guidance
Chroma Technology manufactures high-performance optical interference filters using sputtering and ion beam technologies.
Covering a spectral range from 200nm-3000nm, our wide-ranging capabilities enable us to offer a broad array of filter products
offering superior durability and longevity, and spanning many industrial applications.
It’s all about the contrast
High-Performance Machine Vision Filters
630 Red
LED Output
Chroma’s
ContrastMax filters
100
See only what
you want to see
More light where
you want it
90
80
70
Transmission (%)
Chroma’s
filters
give you 95% transmission across
the passband, and nothing else.
60
Competitor’s filters
50
More light where
you don’t
40
30
Result: Optimal image data
20
10
0
560
570
580
590
600
610
620
630
640
650
660
670
680
690
700
Wavelength (nm)
Measure the difference
Chroma’s ContrastMax filters provide a dramatic improvement in
contrast over competitor’s color glass-based filters.
Competitor’s
ContrastMax Standard
Narrow Green Bandpass Filter
250
250
200
200
NO FILTER
200
74.11
51.19
0
100
200
300
400
500
600
Distance (pixels)
150
100
RED/PURPLE CONTRAST
GOOD CONTRAST
75.41
73.83
50
0
35.50
0
100
200
300
400
500
600
Distance (pixels)
49.2% 18.3%
RED/GREEN CONTRAST
168.50
165.55
150
100
50
0
250
Gray Value
Gray Value
100
MV520/20 Narrow Green #1 Vision Filter
Gray Value
150.35
150
Color Camera Image
Ambient Light + RGB LED Lighting
ContrastMax Narrow
MV525/40 Green Vision Filter
31.23
0
0
100
200
300
400
500
600
Distance (pixels)
64.7% 35.1%
RED/GREEN CONTRAST
50
RED/PURPLE CONTRAST
BETTER CONTRAST
CHROMA TECHNOLOGY CORP®
Contact: [email protected] or +1-800-824-7662 • +1-802-428-2500 · www.chroma.com/machine-vision
68.7% 41.4%
RED/GREEN CONTRAST
RED/PURPLE CONTRAST
BEST CONTRAST
Standard 40nm-wide filters are intended for routine use while Narrow 20nm-wide
filters offer the highest levels of precision for laser diodes and LEDs.
High-Performance Machine Vision Filters
40nm-wide Standard MV Bandpass Filters
20nm-wide Narrow Bandpass Filters
plotted with common LED spectra
100
100
90
90
80
80
70
70
Transmission (%)
Transmission (%)
plotted with common LED spectra
60
50
40
60
50
40
30
30
20
20
10
10
0
350
400
450
500
550
600
650
700
750
800
850
900
0
350
400
450
Wavelength (nm)
500
550
600
650
700
750
Wavelength (nm)
MV380/60
MV470/40
MV525/40
MV585/40
MV630/40
MV660/40
MV785/40
MV850/40
MV405/20
MV450/20
MV490/20
MV532/20
MV590/20
MV635/20
MV660/20
350–410nm
450–490nm
505–545nm
565–605nm
610–650nm
640–680nm
765–805nm
830–870nm
395–415nm
440–460nm
480–500nm
522–542nm
580–600nm
625–645nm
650–670nm
Can your filter block unwanted light from a laser or a bright LED?
We know that you wouldn't aim a laser
pointer directly on your imaging field of
view, like in this image.
Or what if very bright light from a laser or
LED that you don’t want to detect is either
scattered or reflected into the scene?
But what if you use a laser or structured
illumination in your imaging process, and
you want to see it in one channel but not
in the other channel?
ContrastMax filters provide the optical
density you need to block out that bright,
unwanted light and see only what
you want to see.
SAMPLE AREA
ContrastMax MV525/40 Green Vision Filter
Optical Density
Superior blocking
CONTRASTMAX
MV525/40 Green
Vision Filter
Wavelength
SAMPLE AREA
COMPETITOR
532nm Narrow
Green Bandpass
Filter
Optical Density
Competitor 532nm Narrow Green Bandpass Filter
Wavelength
CHROMA TECHNOLOGY CORP®
Contact: [email protected] or +1-800-824-7662 • +1-802-428-2500 · www.chroma.com/machine-vision
November 2016