The Bi-Tech Sensor - BTS -   brings two light sensor tech­no­lo­gies to­gether:

CIE/DIN photometric V(λ), colori­metric or radiometric integral detec­tors are combined with a diode array

The integral detector’s func­tion is to measure­ the incident light intensity in absolute light mea­sure­ment quantities

The diode array detector’s function is to measure the spectral distri­bution of the incident light

The stored diode array  data is used for real time com­pu­tational correction of the integral detector’s system­atical spectral un­certainty as well as for peak wavelength, lumi­nous color data and color rendering index mea­sure­ments.

The X4 Light Analyzer em­ploys BTS two sensor tech­no­logy:
The X4 integral detector offers a fine mat­­ch to CIE photopic, radiometric or co­lori­metric func­tion en­abling its stand alone use in applications requiring wide dynamic range and fast data logger operations unachievable with diode array detectors.

In the BTS mode the inte­gral de­tec­tor readings are cor­rected on-line using the diode array’s measured  spectral distribution data of the light source under test.

The measurement uncer­tainty of the X4 in the BTS mo­de is on par with labo­ratory reference photo­me­ters, colorimeters and radio­meters as well as high level spectral radio­meters. In BTS mode the dy­na­mic range is limited to that of the diode array.

The diode array detector en­ables X4 Light Analyzer use as a di­ode array spectro­meter providing spectral distribution data of test light sour­ces and eva­lu­a­tion of peak wave­length. The diode array by itself allows colori­metric cal­culations for all kinds of light sources. Optionally an integral tristimulus detector can be used to improve the accuracy  level of luminous color measurements.

At the heart of the X4 Light Ana­lyzer is its dual tech­nology sen­sor (BTS) set-up. This uni­que design permits several sensors to detect light through only one shar­ed window.

A compact size high ef­fi­ci­ency light integrator is loca­ted be­hind a large 1 cm² (12 mm dia­me­ter) diffuse win­dow. This makes it possible to simultaneously operate up to four in­tegral detec­tors for intensity measurements in absolute units, data log­ging with fast sampling rates and for the measurement of light emitted outside of the diode array sensor’s spectral sensi­tivity range.

Detected light is transmitted to the external X4 electronic unit by a light guide positioned to directly view the back side of the input window. A manually controlled attenu­ator allows selection of the optimal sensitivity range of the diode array sensor. The measured spectral distri­bution data is used for on-line a(Z) correction of the integral sensor and for cal­cu­lation of the colorimetric data. The diode array sen­sor is also useful for gen­eral pur­pose spectral distri­bution mea­surement appli­cations.

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