Kowa-Cameras-Lenses-Catalogue-2024-KODE - Flipbook - Page 88
Fundamentals of Cameras and Lenses
① Imaging Cameras, Lenses and Lighting
Cameras and lenses are critical components for image processing
inspections.
Image processing typically follows four stages:
① Imaging ② Transfer ③ Processing ④ Output
Cameras and lenses are directly involved in the 昀椀rst step (Imaging).
Although stage ③ (Processing) often receives the most focus, its e昀昀ectiveness
depends on capturing precise and stable images. Selecting the optimal camera
and lens for the object and environment is the most e昀昀ective way to ensure
successful inspection results.
② Transfer Cables
③ Processing Software
④ Output External Devices
Our Cameras
Color and Monochrome
Color cameras are ideal when inspections require judgments
based on color information, while monochrome cameras are
recommended when color is not a determining factor.
In general, monochrome cameras o昀昀er higher sensitivity compared to color cameras. They also provide advantages in terms of
faster shutter speeds and greater 昀氀exibility in adjusting depth of
昀椀eld.
Color
Monochrome
Resolution
Image sensors are built into cameras, and they determine the camera’s resolution.
Higher-resolution cameras enable more detailed and precise inspections, making them suitable for applications that require
昀椀ne image analysis.
Actual Photograph
Low Resolution Image
High Resolution Image
Shutter Systems
There are two main types of image sensors: global shutter and rolling shutter.
In a rolling shutter system, the image is captured line by line in sequence, resulting in slight di昀昀erences in exposure timing
across the frame. When imaging moving objects, this can cause distortion, commonly known as the rolling shutter e昀昀ect.
By contrast, a global shutter system exposes the entire image simultaneously, eliminating this type of distortion. For
accurate imaging of moving objects, the use of a global shutter is essential.
Global Shutter
Makes it possible to
capture moving objects
as if they are not in
motion.
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Rolling Shutter
Distortion may occur
when imaging moving
objects.
