Traditional Culture Encyclopedia - Photography and portraiture - How to choose an intraoral camera? What issues should we pay attention to?
How to choose an intraoral camera? What issues should we pay attention to?
Nowadays, there are many sellers of intraoral cameras. Likewise, a large number of low-end and inferior oral cameras are impacting the market. How do we choose intraoral cameras?
1. The appearance design and materials of intraoral cameras. The materials used in low-end intraoral cameras are poor, the appearance is not beautiful, and the molds are rough. For example, the design of the endoscope is not good, which is directly related to the quality. Mainly manifested in the oral camera On the buttons and power switch. Low-end intraoral cameras use plastic switches. The power switch has two types: up and down buttons and front and back push type. These two switches are small and have a large stroke. If they are used repeatedly, they are easily damaged. It won't work. Good intraoral cameras generally use metal micro-touch switches. They have no stroke and are durable for long-term use. It is best to use digital circuit control or magnet control for the power switch. But there are not many on the market. 2. Wires and connection methods. Many intraoral cameras are connected to the frame machine (i.e. image processor) without buckling. When the dentist uses it, due to constant rotation or pulling, the connection wire will become loose, and the socket will need to be reconnected frequently. It will bring great inconvenience to the work. If the wire material is too poor, the wire will be easily segmented in the middle and it will not work.
3. The image is not clear. Black edges, etc. are mainly caused by the lens and lighting. The image is not clear. The clarity and blur are caused by the wrong focal length of the lens. Many low-end intraoral cameras are made directly from mobile phone cameras. They cannot be compared with professional cameras. The black edges are because the lens is too small and cannot let in light. The cold light source is insufficient. That is cold light. Caused by lamp failure
4. Poor image quality. Mainly made of low-cost chips, which directly affects the image effect
Selection method:
1) Looking at the camera, there are two types of intraoral camera cameras: CMOS chip and CCD chip. The type of camera determines the quality of the image. The camera using the CCD chip has better image quality and is clearer. Generally, this kind of chip The image captured by the camera is VGA output, and the image quality of the camera using CMOS chip is slightly worse. Generally, the image captured by the camera with this chip is AV output or USB output.
2) Look at the pixels, because the intraoral camera is a macro camera, and the shooting distance is only 8 mm to 50 mm. The CCD chip currently developed in China has an effective pixel range of 860,000-1.3 million, and the CMOS chip has an effective pixel range of 860,000-1.3 million. Effective pixels are between 300,000-1.3 million. To judge whether an intraoral camera is clear, you can tell by looking at the edges of the captured image. If the image edges are smooth and clear, it means the clarity is good. If the image edges are jagged, it means the imaging quality is poor.
3) Look at the storage function. This is a very important function of an intraoral camera and an important factor for doctors to choose an intraoral camera. Currently, most endoscopes on the market only temporarily store pictures. (Most of them save 28 pictures). When the power is turned off, the pictures disappear. To save the pictures, the doctor must connect to the computer, which is quite cumbersome. Newly released this year is an SD card intraoral camera that can store pictures in the SD card on the handle. The system can store 4,000 pictures as standard, which can bring a lot of convenience to dental doctors. Now an intraoral camera produced by Wuxi Yashi Technology Company has these functions.
4) Look at the LED light. Because the inside of the oral cavity is dark, the brightness of the LED light of the intraoral camera becomes a criterion for judging the quality. Generally, a good endoscope should have 6 lights to ensure that it is sufficient. If you put it into the mouth to take pictures, in addition to the teeth, other background parts of the mouth should also be brighter, so that you can get better results.
5) Look at the matching monitor. If it is a matching ordinary monitor, it should be bright. Open the menu button of the monitor and see if the brightness or contrast is at 50%. If the display effect is very good at 50%, it means the monitor The quality is good. Another thing to remind everyone is that endoscope images are all in a 4:3 ratio. Don’t blindly pursue a 16:9 widescreen. Otherwise, you will bring losses to yourself if you find that the image is deformed after you buy it. Also, the bigger the monitor, the better. The current international mainstream LCD screen configuration is 15 inches, and the maximum is 17 inches. If it is too large, it will not be coordinated on the dental chair, and the patient will feel depressed when lying on the dental chair.
The new multimedia monitors on the market now are generally 15-inch ones. When buying this kind of monitor, you need to know whether the clinic’s promotional video can be produced (usually produced by manufacturers for free), and whether there are doctors and patients. Communication function, whether it can play videos, music, pictures, e-books, and most importantly, whether it has expansion functions. If a USB flash drive or SD card can be inserted, the device has expansion functions and system update functions, which can ensure that the device can be used in the future. Continuously updated and will not be eliminated.
I wish you can buy an intraoral camera that suits you