Kowa Machine Vision Catalogue 2022 - Catalog - Page 26
FA/MV LENS TECHNOLOGY
Various types of lenses are used in machine vision systems. In
order to achieve the highest performance, it is important to select
the lens most suitable for the application.
Custom Design
Would you like to create your optimum lens?
Image size represents size of camera sensor
Camera
1/4inch
1/3inch
1/2inch
1/1.8inch
2/3inch
1inch
1.1inch
1.2inch
4/3inch
APS-C
2(Φ32)inch
Hor.(mm)
3.6
4.8
6.4
7.2
8.8
12.8
14.1
15.4
18.4
22.3
25.6
Ver.(mm)
2.7
3.6
4.8
5.4
6.6
9.6
10.6
11.5
13.8
16.7
19.2
Dia.(mm)
4.5
6
8
9
11
16
17.6
19.2
23
27.9
32
Kowa Customized Lenses
2"(Φ32)
APS-C
Kowa proposes consistent product creation, from designing
to trial manufacturing, production, performance evaluation,
and quality assurance.
Kowa accepts orders to design and manufacture a wide range of optical designs that match customer needs. In addition
to designing the optics, we can provide system designs which also combine mechanical and electrical systems and
software. Further, Kowa works together with customers to actively propose designs such as for improving technical
levels or solving cost-related problems.
E xamples
of
technical
development
● Optical systems for image processing
● Optical systems for laser scanning
● Optical systems for 3D measurement
● Optical systems for semiconductor manufacturing equipment
● Optical systems with built-in lighting
● Temperature-resistant and vibration-resistant optical systems
● Optical systems for surveillance
● Ultra-high resolution optical systems
● Optical systems for robot vision
Optical processing technologies
Kowa will manufacture various types of optical components to meet customers' requirements regarding shape and precision.
Further, we offer a variety of coatings, including anti-reflective coatings, multilayer filters, and special-purpose coatings.
E xamples
of
technical
products
● Various types of parabolic mirror processed products/glass
● Plastic molded lens mold core processed products
● Crystal processed products for IR imaging (Germanium processed products, etc.)
● Precision-cut components (Germanium processed products, etc.)
■Resolving power
The resolving power indicates the degree of detailed information
that can be acquired by the lens. In the image created by the lens,
the details of black and white stripes which can be distinguished
from striped patterns are shown in units of lines per mm or line
pairs (LP) per mm. These units express the maximum number of
lines of the striped pattern that can be discerned in a 1mm width
when counting each pair of black and white lines as one line.
For example, for a lens that has a resolving power of 80 lines/mm,
when viewing the striped pattern through the lens, information
can be acquired to discern patterns having up to 80 lines per
1mm width.
Lens for
Ordinary lens
megapixel imaging
YAG laser cut filters
Special mirrors
Water-repellant coatings
Special phase coatings
Ultra-precise processed
products
Ion-assisted deposition
machine
Spectrophotometers
Various types of prisms
Meeting and quotation
■Angle of view
The angle of view indicates the shooting range of defined image
size as an angle. The finite angle of view θ can be roughly
estimated from the formula ② below. However, this formula does
not apply to lenses that have large distortions.
Y
Y’
θ= 2tan — = 2tan-1 —
2f
2L
Y= Object size
Y= Image size
L=Object distance
f =Focal length
θ=Angle of view
For example, to find the angle of view θ when shooting an object
300mm away using a 1/2'' camera and 16mm focal length lens,
substitute f = 16 and Y' = 6.4 in formula k to find θ (Horizontal) =
2tan-1 (6.4/2/16) = 22.6°, and substitute f = 16 and Y' = 4.8 in
formula k to find θ (Vertical) = 2tan-1 (4.8/2/16) = 17.1°. The
angle of view will therefore be 22.6° x 17.1°.
INDUSTRIAL FA/MV LENSES
Fluorite crystal material
grinding
Kowa will provide suggestions about the customized optics based on the flow chart below.
-1
50
Various types of spherical
and aspherical lenses
Meeting with
customer
Define
specification
Designing phase
Optical
designing
Provide design
results
Prototype and
production phase
Parts
arrangement
Assembly and
adjustment
Optical
simulation
Mechanical and
electrical designing
Provide prototype
Provide simulation
results
Provide a complete
product design
Final evaluation
Quotation
Production
INDUSTRIAL FA/MV LENSES
51