施耐德镜头介绍

Our Vision: We want to improve vision system technology for industrial and non-manufacturing image processing applications.
Our Mission: Providing high quality optical solutions for image processing applications helps system integrators and equipment manufacturers to enhance their vision systems. Our engineering and product developments are driven by the requirements derived from long-term partnerships with our customers. Our employees are the fundamental success factor and we trust in their commitment to solve our customer’s problems. Our 90-years of expertise in optical design and manufacturing allows us to produce superior products and provide a professional consultancy and support to contribute to the success of our customers.
Nyquist Frequency
For a pixel size (p) of 5 microns (0.005 mm), the Nyquist frequency is:
1
1
RN =
2xp
=
0,005 x 2
= 100 Lp/mm
The Nyquist frequency is the limit of the number of line pairs per mm, for example determined by the pixel size of the sensor. It is the maximum possible resolution.
10mm 6.5mm 2mm
General Market & Technology Trends
Driving factors for surface and web inspection in QA of manufacturing: • Detection of smaller defect sizes (< 10 microns) • Better reliability of inspection process (‘zero defect’) • Reduced cost by more efficient component use (faster scan for increased throughput) Impact on machine vision components: • increasing resolution of line scan cameras (4k, 8k, 12k, 16k, …) • smaller pixel sizes of line scan sensors (7 microns, 5 microns, 3.5 microns) • high performance optics for macro imaging
Schneider Bando Ltd. | Seoul, Korea
Pentacon GmbH | Dresden, Germany Schneider Kreuznach ISCO Division GmbH & Co. KG | Göttingen, Germany
It’s all about focus on segments Schneider Business Units
MTF
The MTF (Modulation Transfer Function) describes the quality of an imaging system with respect to sharpness and contrast. 0 =black Brightness Distribution: 1 = white
Photo Cinema Industry
Cinema
Digital Projection Projection Lenses
Industry
Servo Hydraulics
Industrial Optics
Photo Optics
B+W Filter Ophthalmic Lenses
Photo
Schneider’s Business Unit Industrial Optics
case
相机型号：P3-8x-12K 分辨率：12k， Sensor size：61.44 pixel size: 5μ Mount: M72 Depth： 9.4mm 拍摄视野:620mm 拍摄高度控制在: 500-700之间 MK-CPN-S 4.0/60 Ext. tube 10mm V/V Adapter V/leica Unifoc 76 Adapter M58/M72*0.75 14802 20178 20054 13048 13052
Modulation (MTF) = "Difference in Brightness" Modulation as a function of the fineness of lines (No. of line pairs/mm) I(MAX) – I(MIN) Modulation = -----------------------I(MAX) + I(MIN)
1. How to choose the correct lens
2. What can we do with the Schneider lens
object
f
2f
2f
f
Image
To choose the right lens you must know …
Which camera is used? • Size of the sensor? – That defines the required image circle of the lens: e.g. a 2/3 inch format CCD requires a lens with image circle 11 mm diagonal e.g. a 8k 7µm line scan CCD requires a a lens with image circle 58 mm • Pixel size? – That defines the required image side resolution of the lens: e.g. a 7 µm pixel size means a Nyquist frequency of 72 lp/mm e.g. a 5 µm pixel size means a Nyquist frequency of 100 lp/mm • Lens interface? – That defines the mechanical adaptation and for some interfaces the distance between flange and sensor: e.g. C-mount (flange – sensor distance 17.52 mm) e.g. F-mount (flange – sensor distance 46.5 mm) for other interface such as M42 or M72, you need to know the camera specific distance • You may specify the manufacturer and model of the camera.
Lenses for high resolution machine vision
It’s all about confidence and cooperation Schneider
1 group 8 companies local partner network
Jos. Schneider Optische Werke GmbH | Germany Schneider Optics, Inc. | New York & CPO | Los Angeles, USA Schneider Asia Pacific Ltd. | Hong Kong Schneider Optical Technologies (Shenzhen) Co. Ltd. | China
Requirements on Optics
Imaging attributes characterizing a high quality lens:
• • • • • • •
image sharpness and contrast over the entire field geometrically accurate reproduction over the entire field uniform high performance for any point in the field homogeneous brightness distribution over the entire image field high and uniform spectral transmission color fringes as small as possible as little stray light as possible
Gaussian Optics
H y Object Height H'
F' F f'
Sf
S OO' HH'
y' Image Height
∑d
S'f' S'
∆X
magnification beta’ = image height y’ / object height y OO' = total track (object to image distance) F-Number F# = f' / EP = 1 / 2 N.A.’ effective F-Number F#eff = (1-beta’) ·F#infinity
源自文库
EP: entrance pupil n’= refractive index (image plane) u’= aperture angle (image plane) numerical aperture N.A.’ = n' sin u'
For our Makro and Unifoc System: Use our XLS-Calculator to check the possible configurations with our CPN lenses such as required length of extension tubes Note for Makro and Unifoc System: Magnification ratios towards stronger reduction need an increasing minimum distance between the lens and the sensor, so for interfaces with large distances to the sensor, there is a minimum focal length required: example: F-mount interface, magnification ß’=0.1 requires a focal length f 80 mm In general: try to avoid F-mount, better use M42 instead