What is a densitometer?

Denzitometer is a piece of scientific equipment that is designed to measure optical density. Denzitometers are used in various scientific applications as well as photographers and printers who need to check the quality of their work. Numerous companies produce densitometers, including special devices that have been adapted for specific applications. The optical density is determined by seeing how much light to read the object. This type of densitometer is often used to measure optical density in the film, with data used in different ways during the film development process. In this case, the amount of light reflected is the measurement object. For example, a photographer could use the transmission method to read the movie and the reflection method to read a photograph. Some densitometers are capable of both features, allowing people to adjust the settings for different applications. Denzitometer is also used during press checks to confirm that the material is correctly printing, and to compare the appearance of movies used to prepare TIsk's boards with the resulting printed product.

Denzitometry is used in a wide range of ways. For a special type of densitometry used to measure bone density, density is measured by passing by X -ray with the body. In this case, bone density can be determined by visiting how many X -rays pass. Extreme changes in bone density can often be identified by just looking at the X -ray film as soon as the porous bone appears darker on the X -ray, while the thicker bone seems to be whiter, suggesting that these areas of the film have not been so strongly exposed to X -rays.

Denzitometers usually must be allowed to warm up before they can be used. It is also important to calibrate them to ensure that the values ​​are accurate and consistent. Calibration can be done using calibration cards provided by the manufacturer; Each card has a range of sampling areas of density that can be drivenZET densitometer, while the values ​​of the device are compared with the printed density level on the card.