Technologies

The most powerful driving force that enables Vieworks to become a leading developer and manufacturer
of the most customer-satisfactory imaging systems is its core technologies such as optics, mechanics,
electronics and software. The strength of Vieworks lies in its capability of all-in-house design and
quality control based upon its possession in all these core technologies in house.

Core Technologies of Industrial Imaging

  • Pixel Shifting
    Extended image resolution with nanotechnology
    Overcome sensor's physical limitation
  • Thermal Control
    Unique cooling technology enables stable operation in limited thermal conditions
  • TDI Line Scan
    Fast & precise high resolution line-scan camera technology
  • Custom Design Cameras
    Accumulated design expertise in ODM business
    All core technologies available in-house
  • Sensor Processing Technology
    Experts in sensor processing techniques
    Advanced Image processing skills
  • Diverse Camera Features
    Variety of functions optimized to applications
    Environmental designs for surveillance & aerial imaging
  • Distinguished Image Quality
    World's best image quality ensured with specialties in circuit design and noise handling know-how
  • Circuit Design Expertise
    Strong in traditional analog circuit design
    15 years experiences in electronics design

TDI Line Scanning

In the industrial imaging market, industrial cameras divide into Area Scan and Line Scan cameras based on how an image is captured. Area scan cameras are equipped with an imaging sensor comprised of a matrix of pixels. The numerous lines of pixels are exposed at the same time, so that a frame is acquired in one single step. Area scan cameras are typically suitable for imaging stopped or slowly moving objects. On the contrary, line scan cameras are equipped with an imaging sensor comprised of one or two lines of pixels.
The image data is acquired line by line, and this series of image data forms an entire image during the processing stage.
Line scan cameras provide a better solution for large or continuously moving objects than area scan cameras.

Time delayed integration (TDI) line scan is an advanced type of line scan technology based on multiple lines of pixels.
A TDI line scan camera provides a higher sensitivity as it integrates image data of each line according to the number of the comprised lines (commonly referred as 'stage').

Vieworks has developed hybrid TDI line sensor to improve TDI line scanning performance. The Hybrid TDI sensor with CCD pixel structure implemented by using CMOS technology allows ultra-high speed image captures with up to 256 times greater sensitivity. It is the first concept of TDI line scan sensor and Vieworks named it VTDI (Vieworks TDI). Vieworks confidently secures the highest level of technology in machine vision industry.

Main Features
- 4k / 6k / 9k / 12k / 18k / 23k various resolution
- 3.5㎛ / 5㎛ / 7㎛ / 10㎛ / 14㎛ pixel size
- Hybrid TDI imaging sensor
- Max. 250kHz Line Rate (250 kHz @9k, 200kHz @12k)
- 256 TDI Stages
- Camera Link or CoaXPress interface
Applications
- FPD inspection
- Wafer inspection
- PCB inspection
- High-performance document scanning

Pixel Shifting
Technology

Pixel Shifting technology allows a camera to acquire ultra high resolution images by adopting 2-dimensional nano-stage
(Piezoelectric actuator). Due to the technology limitation of existing imaging sensors, it is impossible to acquire ultra
high resolution images using industrial cameras commercially available in the market. Cameras, VN and VNP series,
based on the Pixel Shifting technology acquire multiple images by mechanically shifting the imaging sensor in X and Y directions,
and combine those images to generate an output image with extended resolution.
As the imaging sensor can move in the unit of nanometers, the imaging sensor can detect the blind areas.
This means that a camera based on the pixel shifting technology can realize 100% fill factor.
Furthermore, applying the pixel shifting technology to a color camera realizes true color images without using 3 CCD/CMOS cameras.
Main Features
- Nano Stage Pixel Shifting Mechanism
- True Color Full Image Resolution
- Improved Fill Factor
Applications
- Display and PCB inspection
- Scientific imaging
- Document and film scanning

Thermoelectric
Cooling Technology

Thermoelectric cooling technology uses the Peltier effect to create a heat flux between the junction of two different types of materials.
When DC current flows through these two materials, it brings heat from one side to the other, so that one side gets cooler while
the other gets hotter. The hot side is attached to a heat sink so that it remains at ambient temperature, while the cool side goes
below room temperature. Vieworks has applied TEC to both VP and VNP series to maintain the operating temperature of the CCD
at up to 20 degrees below ambient temperature. These cameras provide a stable operating condition or the ability to expose for
a long period of time to increase camera sensitivity.
Main Features
- Thermoelectric Peltier Cooled
- 20 degrees below ambient temperature
Applications
- Display and PCB inspection
- Scientific imaging