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Industrial Cameras

Q.

What is a CCD?

A CCD is a semiconductor image device that stores light striking the photodiodes and converts it to photoelectrons. These are then read out as voltage, amplified to output and relayed down the output circuit

Q.

What is a Line Sensor?

A line sensor consists of multiple image sensors arranged in a dense row. It operates on the same principles as data-reading sensors in fax or copy machines used in the home. There are many types with varying numbers of pixels (512, 1024, 2048, 4096, 5150, 7,600, etc.) and they include colour line sensors, which are mainly used for printing inspection, and monochrome line sensors, which are mainly used for inspecting plain materials.

Q.

What is the difference between an area sensor and a line sensor?

In a line sensor, sensor pixels are arranged in a single row whereas in area sensors, two dimensional arrays of pixels are arranged in a plane formation, making it possible to obtain a 2-dimensional image.

Q.

What types of fields are line sensors used for?

Line sensors are used to detect pinholes and other flaws in materials for many common products, such as film for packaging, PET for plastic bottles and packages, glass for mirrors and LCD televisions, and wallpaper and other materials for building. They can be used to inspect sheets, rolls or any other shape that can be grasped 2-dimensionally.

Q.

What type of light is used?

The most common type is fluorescent but depending on the material to be inspected or the specifications, halogen, LED or other special types may be used.

Q.

What is binning?

Binning is a method for increasing sensitivity by combining two neighboring pixels to form one larger pixel. While resolution of sensor is reduced, this method makes it possible to double sensitivity at the same line rate.

Q.

What is the difference between 1CCD and 3CCD?

1CCD cameras capture colour and brightness all on one CCD sensor, using a colour filter. Resolution, however, is poorer. 3CCD cameras have three CCD sensors, one each for Red, Green and Blue. A prism splits the light beam while each CCD measures the brightness of the colour spectrum. Consequently, 3CCD cameras provide excellent colour images. They also have higher sensitivity and resolution. Because they are more complex, requiring a prism and circuit for each of the three colours, 3CCD cameras are more expensive than 1CCD cameras.

Wireless Remote Surveillance System

Q.

What is the Wireless Remote Surveillance System?

The Wireless Remote Surveillance System relays still photos taken at a remote station to a base station in a different location using an NTT DoCoMo FOMA cell phone for high-speed transmission. The system is solar-powered so that it can be used in remote locations without an external power source and uses FOMA to transmit data so that it can also be used in areas without communications infrastructure.

Q.

What applications can the Wireless Remote Surveillance System be used for?

Because it does not require an external power supply, this is an excellent system for round-the-clock surveillance in remote areas to detect illegal dumping or trespassing, in factories or grounds to catch intruders, and for unmanned premises such as coin laundries.

Q.

What is a remote station?

A remote station refers to the location being monitored by the Wireless Remote Surveillance System. It is equipped with a high-sensitivity CCD camera, a halogen lamp, a camera box with built-in sensor receiver, a control component that performs image processing and data transmission, a control box with built-in solar battery and a sensor transmitter.

Q.

What is a base station?

A base station is basically the computer that controls the remote station in the Wireless Remote Surveillance System and it is equipped with software applications to send commands to the remote station and to receive, process and display images.

Q.

When are pictures taken at a remote station?

In general, pictures are taken automatically when the intruder sensor is triggered. It is also possible to use the base station computer to take pictures at the remote station by remote control and to program the camera to take pictures at fixed intervals.