A device to reproduce a natural scene under constant and defined lighting conditions
Tt charts are used to tt dial cameras and to perform objective measurements. But there are certain aspects in tting a camera that require a real scene. One of the aspects is the correct white balancing for different t of illuminants. Another aspect might be the determination of the visual loss of detail due to noise reduction or the amount of noise in an image. To perform the kinds of tts is one thing and to have them comparable over time or for different teams working in different locations is another.
We have developed the lightSTUDIO to make this possible. It provid the standard t of illumination and is large enough to illuminate a whole table scene. It also allows for remote control and the dimming of the lights from a PC using a U interface. To get a worldwide comparison between labs the lightSTUDIO com with all the interiour shown on the picture and a detailed dcription of each object and why it is in the box can be found in the user manual.
The 1.3 x 0.8 x 0.8 m lightSTUDIO has six different t of illuminants (D50, D65, F11, F12, tungsten, and tungsten filtered to D55).The user can easily switch between the different illuminants and control the intensity in 1% steps . The control can be operated from the front panel of the device itself or via the integrated U interface. A software that provid a dial version of the front panel is supplied, but through an SDK the control can also be integrated in individual software solutions. To make the usage error proof, the user can switch on only one light source at a time.
After all, having a box with the illumination will only provide you with one half of the complete solution. Now it is important to find natural objects that will reveal possible mistak in the camera’s image procsing and show the limits of the camera's capabiliti. Therefore we are happy to provide a collection of objects that serve this purpose. We have started off with a collection of objects which one of the interted camera manufacturers asked us to provide and added additional items which, based on our 15 year experience, have caused or might cause problems with cameras or show their limitations. The customer who buys the package gets a detailed dcription of the objects and what their intended use is, as well as how to use them. This set of objects is delivered with the lightSTUDIO. That way cameras can be compared at different locations worldwide under defined and constant illumination conditions.
FEATUR OF THE lightSTUDIO
TECHNICAL DATA
| Illumination te | Color tempretaure [K] | max. light level [Lux] | |
| F12 | 2800 | ≥ 1600 | dimmable |
| F11 | 3800 | ≥ 1600 | dimmable |
| D50 | 5000 | ≥ 1600 | dimmable |
| D65 | 6500 | ≥ 1600 | dimmable |
| Halogen 10 lux | 2100 | 10 | fixed dimmed position |
| Halogen 100 lux | 2800 | 100 | fixed dimmed position |
| Halogen 400 lux | 3100 | ≥ 400 | dimmable |
| Halogen 400 lx with blue filter | 10000 | ≥ 400 | dimmable |
| supply voltage | 220 - 230 V . 50/60 Hz |
| outer dimension (cm) . w/h/d | 130 / 80 / 80 |
| inner dmension bottom plate (cm) . w/h | 125 / 75 |
| the height of the area for a tt scene (cm) | 60 |
| weight (kg) | ca. 45 |
| power consumption | max. 200 VA |
| U interface | U 1.1 |
| Illumination te | Te of lamp | Quantity |
| Halogen bulb | NV Halogenlampe 20W 12V MEGA IRC, GU5,3, 60Gr RJLS20W 12 IRC VWFL GU5.3 Other t can be used if they satisfy the following requirements: 12V, 20W, socket GU5.3, emitting angle 60°, with safety gl and cool beam technology | 1600 |
| F12 | OSRAM L 36W/930, or other 36W with CRI (color rendering index) of >90 and color temperature of 2800-3000 K | 1600 |
| F11 | OSRAM L 36W/940, or other 36W with CRI of >90 and color temperature of 3800-4000 K | 1600 |
| D50 | OSRAM L 36W/950, or other 36W with CRI of >90 and color temperature of 5000 K | 1600 |
| D65 | OSRAM L 36W/965, or other 36W with CRI of >90 and color temperature of 6500 K | 10 |
Please note that the box is not digned to illuminate tt charts. It will not provide the spatially uniform illumination required to measure the physical characteristics of a camera using a tt chart. If you need a device to illuminate tt charts please do not hitate to contact us.
