Kowa Machine Vision Catalogue 2022 - Catalog - Page 20
TELECENTRIC
TELECENTRIC
TELECENTRIC Series
2/3 TELECENTRIC 5 MEGAPIXEL PLUS
Telecentric lens with variable magnification
Able to adjust the magnification to match with the pixel size of the camera
Lenses are designed with an optical magnification that is ideal for over 5 megapixels
Distortion free lenses of less than 0.02%. TV distortion is limited to 0.25% on the entire image area even when
used with a 5 megapixel camera
Produces high contrast and resolution in both the center and corners.
Virtually no TV distortion of entire image area.
Telecentric Optical System
Application Examples
In a telecentric optical system, there is no change in magnification when
focusing. Thus, the magnification remains constant at different working
distances. Similarly, the movement of an object also does not change the
magnification, which makes a telecentric lens ideal for measuring objects with
high accuracy.
In a telecentric optical system, the chief rays are parallel to the optical axis.
As a result, the aperture becomes greater as the magnification is fixed by the
focusing rays. This means that the F-number on a telecentric lens tends to be
larger when compared to a standard megapixel lens.
Surface inspection of silicon wafers
Image defect inspections
Inspection of dirt on prisms and glass circuit boards
Measurement of thread pitches
Reading 2D codes
4/3 MACRO ZOOM 21 MEGAPIXEL
Telecentric lens with variable magnification
Able to resolve up to 21 megapixels
0.5×~1.0× for macro use
4/3
MACRO 21 MEGAPIXEL
2.0x for macro use
Able to resolve up to 21 megapixels
✓ Compatible ◇ Suitable − Incompatible
Model
1.2
1.1
LM1138TC
✓
✓
✓
LM1120TC
−
LM1121TC
−
LM1122TC
−
LM1123TC
−
LM1125TC
−
LM1119TC
Model
Magnification Range
LM1119TC
0.5~1.0×
2.0×
Image Size
Shooting Magnification
18.4×13.8(Φ23)
18.4×13.8(Φ23)
0.5×
1.0×
2.0×
Objective N.A.
0.05
0.1
80
36.8×27.6
25.6×19.2
17.6×13.2
0.1
81.8
18.4×13.8
12.8×9.6
8.8×6.6
0.1
W.D(mm)
Shooting
Range
(mm)
4/3 inch
1 inch
2/3 inch
TV Distortion(%)
Back Focus in Air(mm)
Mount
Resolution
Size(mm)(∞)
Weight(g)
Temperature Range
Storage Temperature Range
14.7
C-mount
120lp/mm
Φ82×151.5
1000
−10°C~+50°C
−20°C~+60°C
LM1138TC
INDUSTRIAL FA/MV LENSES
✓
✓
1
✓
✓
−
−
−
−
1/1.2 2/3 1/1.8
✓
−
−
✓
✓
✓
✓
−
−
✓
✓
✓
✓
✓
✓
Collapse
−
−
−
telecentricity
−
−
−
−
−
−
−
−
−
✓
✓
✓
✓
✓
LM1121TC
LM1122TC
LM1123TC
LM1125TC
1.15~1.47×
0.69~0.88×
0.346~0.44×
8.8×6.6(Φ11)
✓
✓
1.725~2.2×
8.8×6.6(Φ11)
✓
✓
3.45~4.4×
8.8×6.6(Φ11)
✓
✓
LM1120TC
8.8×6.6(Φ11)
✓
1/3
✓
Magnification Range
Image Size
1/2
✓
Model
✓
✓
✓
✓
✓
✓
8.8×6.6(Φ11)
3.45×
4.0×
4.4×
1.725×
2.0×
2.2×
1.15×
1.3×
1.47×
0.69×
0.8×
0.88×
0.346×
0.4×
Objective N.A.
0.2
0.2
0.2
0.131
0.131
0.131
0.101
0.101
0.101
0.07
0.07
0.07
0.04
0.04
0.04
0.2
W.D(mm)
65.9
65.9
65.9
114.8
111.4
109.4
111.6
111.6
111.6
111.0
111.0
111.0
112.7
112.7
112.7
80.6
9.20×6.90
6.40×4.8
4.4×3.3
0.1
15.0
C-mount
120lp/mm
Φ64×151.0
830
−10°C~+50°C
−20°C~+60°C
Shooting
Range
(mm)
Shooting Magnification
0.44×
2/3 inch
2.6×1.9
2.2×1.7
2.0×1.5
5.1×3.8
4.4×3.3
4.0×3.0
7.6×5.7
6.6×5.0
6.0×4.5
12.7×9.6
11.0×8.2 10.0×7.5
25.4×19.1
22.0×16.5
20.0×15.0
1/1.8 inch
2.1×1.6
1.8×1.4
1.6×1.2
4.2×3.1
3.6×2.7
3.3×2.4
6.3×4.7
5.5×4.1
4.9×3.7
10.4×7.8
9.0×6.7
8.2×6.1
20.9×15.7
18.1×13.6
16.5×12.3
1/2 inch
TV Distortion(%)
1.9×1.4
1.6×1.2
1.5×1.1
3.7×2.8
3.2×2.4
2.9×2.2
5.6×4.2
4.9×3.7
4.3×3.3
9.3×7.0
8.0×6.0
7.3×5.5
18.6×13.9
16.1×12.1
14.6×11.0
0.015
0.003
−0.002
0.011
0.004
0.001
−0.015
−0.001
0.011
−0.001
−0.009
0.005
0.02
−0.009
0.01
Back Focus in Air(mm)
17.1
24.5
30
55.8
67.7
76.3
18.7
23.6
29.8
34
28.8
25.3
17.6
17
16.5
Mount
Resolution
Filter Thread(mm)
C-mount
120lp/mm
-
Size(mm)(∞)
Weight(g)
Temperature Range
Storage Temperature Range
† Images may differ from the actual product.
38
Format Size(Inch)
4/3
C-mount
120lp/mm
-
C-mount
120lp/mm
-
C-mount
120lp/mm
-
C-mount
120lp/mm
-
Φ57×180.0
Φ48×147.5
Φ50×123.9
Φ50×121.5
Φ51.5×142.3
645
420
330
290
420
−10°C~+50°C
−20°C~+60°C
−10°C~+50°C
−20°C~+60°C
−10°C~+50°C
−20°C~+60°C
−10°C~+50°C
−20°C~+60°C
−10°C~+50°C
−20°C~+60°C
† Images may differ from the actual product.
INDUSTRIAL FA/MV LENSES
39