Introduction - Image Engineering lightSTUDIO User Manual

2 INTRODUCTION

lightSTUDIO is a lightbox for the illumination of a scene with different standardized light types.
Two types of light heads are available: the Standard lightHEAD and the LED lightHEAD. The basic
version contains six light sources with a blue filter (~10000 K). All light sources can be dimmed from 1-
100% to set an appropriate light level. The LED version uses 20 narrow bands and two white LED
channels for the creation of almost every desired spectral distribution. A spectroradiometer provides
feedback to the control software to ensure spectra and intensities are accurately reproduced. Spectral
distributions can be changed rapidly within 25 ms.
lightSTUDIO-M is an extension with two moving targets, a horizontally moving frame, which can be
equipped with any test chart, and a rotating plate on the back wall that can carry different round test
charts. The velocity of both moving options can be varied over a wide range.
The HDR option adds the capability to generate high-contrast scenes in the center part of the back
image. Two LG4 lightboxes can produce a contrast ratio of up to 10.000:1 when the surrounding
illumination is dimmed, and they can also be equipped with different transparent test charts.
All variants of lightSTUDIO are equipped with interior objects which represent a wide range of real-
world situations. Amongst these is, for example, a ColorChecker for measuring the color reproduction
and the white balance.
lightSTUDIO can be controlled in all combinations by software using a USB connection to a Windows
PC. The Standard lightHEAD is also controllable with a panel on its front side.
NOTES FOR READING THIS MANUAL:
Numbers in square brackets [ ] in the text refer to the red numbers in the images.
Text in italics refers to labels on control elements of the software.
DEFINITION:
The term illuminant in the context of the lightSTUDIO is used as follows: The combination of
a relative spectral response curve (predefined or measured) and an illumination value in lux,
which is achieved at a dedicated position in the lightbox. This information is saved in a
proprietary file format with a file ending .iqilluminant. Illuminants must be generated before
the LED lightHEAD can be used.
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