Product introduction

Auto focus is based on the principle of object light reflection. The reflected light is accepted by the CCD sensor on the camera. Through computer processing, the electric focusing device is driven to focus, which is called auto focus. It can be divided into two types: active and passive.

classification

1. Active autofocus:

The infrared generator and ultrasonic generator on the CCD of the camera emit infrared light or ultrasonic wave to the object. The receiver on the CCD of the camera receives the reflected infrared light or ultrasonic wave to focus. Its optical principle is similar to the trigonometric ranging focusing method, which is widely used in various head up view cameras. It is difficult to focus on the inclined plane of active focusing and smooth surface. It is difficult to focus the object with large brightness and long distance. This is because the light emitted is reflected in other directions or cannot reach the object. Because the camera emits light or wave actively, it can focus in low contrast and weak light. For the thin line object, the object can be automatically focused. The disadvantage is that when the subject can absorb light or wave, it is difficult to focus through the glass.

2. Passive autofocus:

That is to directly receive and analyze the reflection from the scene itself and focus automatically. The advantage of this auto focus mode is that it does not need to launch the system itself. For the subject with a certain brightness, it is ideal to focus automatically, and it can also focus well under the backlight. It can automatically focus on objects with high brightness in the distance. But the disadvantage is that it is difficult to auto focus the object with thin lines. It is difficult to focus in low contrast and weak light. The automatic focusing ability of the moving body is poor. The auto focusing ability of the object with polarized light is poor. Black objects or mirrors have poor focusing ability. Each one has its own merits. The first one is the automatic focusing system of the gel imaging autofocus system. There are two ways of auto focusing. It can be used complementation, automatic switching, and exert its strengths to overcome its weaknesses.

Application scope:

It can be used for the imaging and analysis of DNA/RNA gel, protein gel, imprinted hybrid membrane autoradiography card, enzyme plate, thin layer chromatography plate, Petri dish.

technical parameter

► Digital CCD: pq-p510z digital professional low illumination integral CCD.

► Effective pixel: 2592 × 1944 (5 million pixels).

► Lens: the Japanese Computar high pass auto zoom lens F=1:1.2, 12.5 ~ 75mm, according to the requirements of the size of gel size.

► Data bits: 16 bits (65536 gray scale).

► Image number integration: 1 × 1, 2 × 2, 3 × 3, 4 × 4.

► The pixel size: 4.4 μ m × 4.4 μ M.

► Signal noise: ≥ 60dB.

► Focus mode: full automatic optical digital focusing (full automatic brightness, contrast, auto focus and exposure time).

► Shutter control: electronic shutter.

► Exposure time: 1ms to 120min long time exposure, can continuously collect and store all pictures, and has image correction function.

► Transmission interface: single USB2. The plug and play feature makes the installation, connection and maintenance of the whole image system very simple, convenient and fast.

► Tapping device: special observation and tapping device (visual angle is 90 ° to the object).

► Filter lens: 590nm EB/SYBR Green, BP, which is specially developed for various fluorescent dye gel imaging features.

► Case control: the zoom, focal length, aperture, transmission UV lamp and reflector lamp can be controlled automatically through the chassis panel.

► Computer control: highly programmed (computer controlled auto focus / darkbox / power supply / UV and white light switch / aperture / zoom / focal length).

► Periodic shutdown: the function of timing shutdown (0-1 hour) can be set by yourself to effectively extend the service life of UV lamp and UV glass.

► The opening mode of the instrument: pull-down type door opening and drawer type loading table.

► The UV transmission sample plate: transmission wavelength: 302nm (254nm, 365nm are optional), size: 20cm × 25cm (special specifications can be customized).

► White light reflection: cold light, voltage 12V.

► The white light transmission carrier plate: cold light, voltage 12V, internal foldable 20cm × 25cm (special specifications can be customized).

► Enterprise certification: the third prize of "high tech enterprise" and "Shanghai Science and Technology Award"

► Software: GEL SensiAnsys professional gel image acquisition and analysis software, GEL SensiCapture professional gel image acquisition software.

► Appearance dimension: length 50cm × width 37cm × height 82cm.

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