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The BTS2048-VL light meter

The high-quality BTS2048-VL CCD based spectroradiometer is internationally recognized as a high-end product. It is one of the most compact spectroradiometers on the market which enables direct system integration in many applications without the need for expensive, and potentially measurement degrading, light guides. Among its characteristic features is its diffusor window with cosine corrected  field of view for the measurement of spectral irradiance and spectral illuminance. This also permits direct mounting onto integrating spheres (e.g. the ISD-25) for measurement of luminous flux. More detailed information about the BTS2048-VL can be found in the respective data sheets. This unit is also available in the BTS2048-VL-TEC version with thermoelectric cooling


Enhancement of the BTS2048-VL with the ISD-25-V01 integrating sphere

The ISD-25-V01 can be combined with the BTS2048-VL for the measurement of luminous flux, spectrum, color, and color rendering index of single LEDs, LED matrices, and LED lamps with diameters of up to 76 mm. It can also be used to measure special light sources such as endoscopes, light guide cold sources, etc. The lamp is positioned at the 76.2 mm (3 inch) diameter measurement port during the measurement for which a large, stable mounting plate for fixing of brackets and test sockets is incorporated in the ISD-25-V01. The combination of the BTS2048-VL and the ISD-25-V01 meets the requirements of CIE 127 for measurement of the luminous flux of directional (2pi) LEDs. These include the spectral resolution, dynamic range, and stability of the spectroradiometer as well as the ideal sphere coating, 25 cm diameter, auxiliary lamp, coupling of measurement devices using the diffusor window, and a baffle. A temperature sensor and a diffusor window are also included.


Measurement of the spectral transmission of light guides

Lateral emitting light guides are now deployed in daytime running lights, tail lights and brake lights in the automotive industry. Gigahertz-Optik’s TFCT25 measurement system can be used to measure the different optical transmission parameters, including light guide ‘yellowing’ and the LED lamps. The system is based on a combination of the ISD-25 and BTS2048-VL.


Calibration

One essential quality feature of photometric devices is their precise and traceable calibration. The ISD-25-V01 with the BTS2048-VL has been calibrated at Gigahertz-Optik’s DAkkS-accredited (D-K-15047-01-00) calibration laboratory for the spectral responsivity and spectral irradiance according to ISO/IEC 17025. The calibration is performed with a BN-LHSF-2P-20 calibration lamp that has 2pi radiation characteristics in the integrating sphere. Every device is delivered with its respective calibration certificate.

ISD-25_BTS2048_VL:
BTS2048-VL high end CCD spectroradiometer for cw and flash measurements.
S-BTS2048 User software interface
S-SDK-BTS2048 Software development kit for device integration in customer software
General
Short description

CIE 127-conform spectroradiometer for measurement of the luminous flux, spectrum, color, and color rendering index of spot lamps with diameters of up to 76.2 mm

Main features

Integrating sphere with a 25 cm diameter and a 76.2 mm measurement port. Stable mounting plate for attachment of brackets and test sockets. High-quality CCD sensor spectroradiometer BTS2048-VL.

Measurement range

Luminous flux: Integral 0.05 mlm to 141 klm.

Spectral for typical white LEDs: 5.5 mlm to 43000 klm

Spectral radiant flux: 8E-7 W/nm to 2E3 W/nm

Spectral range: 350 nm to 1050 nm

typical applications

Inspection of incoming products (single LEDs), in-line quality assurance of LED matrices, LED spot lamps, design

Calibration

Factory calibration. Traceable to international standards

Type Description File-Type Download
Datasheet ISD-25-BTS2048-VL PDF
Produktname Product Image Description Show product
BN-LHSF-2P-20 Calibration standard lamp for 2π spectral flux, total flux and CCT.

Features: 100W tungsten halogen lamp with UMPA-1.0-HL mount. 20mm dia diffuser. Optional calibration.

UMPR Port reducer for the port frames of the UM series modular construction integrating spheres.

Features: Closure surface equal to the hollow sphere surface. Barium sulfate or synthetical coating. Trough-holes or knife-edge with different diameters. For use with UMPF port frames.
S-SDK-BTS2048 Software Development Kit for BTS2048 variants.
Article-Nr Modell Description Request / Compare
Product
15306337 ISD-25-V01

Integrating sphere with 25 cm (10 inch) diameter. Measurement port with 76.2 mm (3 inch) port and havey load mounting plate. UMPF-1.0-HL detector port with baffle. Bench-top stand.

15298281 BTS2048-VL

Measuring device, hard cover box, users guide, Software S-BTS2048 calibration certificate

15298687 BTS2048-VL-TEC

Measuring device, hard cover box, users guide, software S-BTS2048, calibration certificate.

Calibration
15300771 K-BTS2048-VL-Phi-2-V1

Calibration of the total flux responsivity in lm and W of the BTS2048-VL with optional integrating sphere. Calibration standard with 2Pi light distribution for sphere illumination by an measurement port. Spectral range 350-1050nm. Calibration certificate.

Re-calibration
15300770 K-BTS2048-VL-E

Calibration of the illuminance, irradiance responsivity and wavelength of the BTS2048-VL.  Spectral range 280-1050nm. Calibration certificate.

15300771 K-BTS2048-VL-Phi-2-V1

Calibration of the total flux responsivity in lm and W of the BTS2048-VL with optional integrating sphere. Calibration standard with 2Pi light distribution for sphere illumination by an measurement port. Spectral range 350-1050nm. Calibration certificate.

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