Characteristics of the XCD-SX910UV
Relative Sensitivity
The relative sensitivity of the camera is determined by the permeability of the optical filter, and the spectroscopic sensitivity characteristics of the CCD mounted in the camera. Thus the relative sensitivity of a camera can be found by looking at the product of the permeability properties of the optical filter and the spectroscopic sensitivity characteristics of the CCD.
This time, the optical filter used in the XCD- SX910UV will allow 200 to 1000 nm wavelength waves to pass, but for the most part, however, it doesn’t depend on the wavelength, but instead utilizes a certain permeability ratio. So the relative sensitivity of the camera is more or less the same as the spectroscopic sensitivity of the CCD.
When shooting a scene illuminated only by ultraviolet light, visible light or infrared light shining on the subject, or entering the camera can have an influence on the image output. In order to obtain an accurate image, some sort of screening equipment will be needed to deal with the visible or the infrared light.
When screening or covering is not possible, to shoot an image using only ultraviolet light in an environment where ultraviolet and visible lights are mixed, it is necessary to change the relative sensitivity response of the camera. In such a case, in order to suppress the sensitivity to visible light, a special filter can be used. This kind of special filter is called an “ultraviolet light permeable filter.” If you set this filter between the camera and the subject, the sensitivity to ultraviolet light relative to visible light increases, and you can create a camera system more responsive to ultraviolet light.
There are many types of special filters available on the market. You can use filters to suit the environment and the shooting conditions, and using just this camera, configure a camera system that has exactly the relative sensitivity characteristics you need.
Appendix
On light sources
This camera is sensitive to ultraviolet light in the 400 nm or less. At the same time, it is sensitive to visible and infrared light above 400 nm in wavelength. So, when shooting a subject illuminated only by ultraviolet light, the visible light or infrared light shining on the subject or entering the camera, can have an influence on the image output. In order to obtain an accurate image, some sort of screening equipment will be needed to deal with both the visible and the infrared light.
If you use ultraviolet light as a light source, use light waves in the appropriate range for the camera sensitivity. Depending on the amount of light, wavelengths shorter than 350 nm can have an effect on the human body. Be especially careful to read the Operating Instructions to obtain a full understanding of how to properly use your light source.
In addition, there are safety considerations when using ultraviolet light, involving light reflected off the camera and light shining around at random. Be sure to take all necessary safety precautions when you use ultraviolet light as a light source.
When you switch back and forth using ultraviolet light and visible light with the same camera, due to aberrations in the lens, there may be some differences in the focus when you use ultraviolet light and when you use visible light.
On the
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