Calibration standards enable the calibration and adjustment of measurement instruments to absolute measurement quantities. Calibration standards provide a reference signal corresponding to the measurement quantity to be calibrated. The reference signal of the calibration standard is calibrated in the respective measurement quantity. The calibration of the measurement instrument is performed by comparing the measurement signal of the measurement device with the standard specifications in the calibration certificate. Deviations are compensated for by adjusting the measurement instrument accordingly.
Measurement of the spectral radiant flux
The spectral radiant flux [W/nm] is important for qualification of illuminants based on their total emitted radiant power. The spectral radiant flux and its photometric equivalent luminous flux is therefore also used in the investigation of the energy efficiency of lamps. In order to measure the spectral radiant flux, the total light emitted by the lamp must be measured regardless of the radiation direction. Integrating sphere spectrometers and goniometers are typical measurement instruments for the spectral radiant flux.
2π radiation characteristics
Calibration standard lamps with 2π radiation distribution characteristics are preferred for calibration of integrating sphere spectrometers that are used in measurement of lamps such as LEDs and spot lamps with hemispherical light distribution. By use of 2π standard lamps calibration is done under similar illumination conditions of the sphere surface, baffle and sample holder as in the test sample measurement.
A special feature of the BN-LHSF-2P-20 calibration standard lamp is its 2π radiation characteristics which make it ideal for calibration of integrating sphere spectrometers used for measurement of LEDs and spot lamps. The calibration standard has a quartz halogen lamp that is characterized by its continuous emission spectrum. The socket of the lamp itself is active air flowed using a fan to maintain emission stability. This standard lamp can be directly mounted at the measurement port of an integrating sphere with an UMPF-1.0-HL port frame. Adapters are also offered for larger frames.
The calibration of the spectral irradiance is performed by Gigahertz-Optik’s calibration laboratory for optical radiation measurement quantities. The calibration is traceable to a reference standard that was calibrated by the national measurement laboratory. Calibration and results of the calibration are confirmed by a calibration certificate which includes all specification and information as ISO 17025 conform certificates.
Gigahertz-Optik GmbH offers lamp power supplies for operation of the calibration standard lamps.
Typical emission spectrum
3D illustration of the luminous intensity distribution
The BN-LHSF-2P-20 calibration standard lamp can be directly mounted on the measurement port of the integrating sphere with an UMPF-1.0-HL port frame.
typ. 266 lm BN-LHSF-2P-20 with 100 W lamp)
|Spectral radiant flux||
Typ. 0.245 mW @ 360 nm (BN-LHSF-2P-20 with 100 W lamp)
360 nm to 830 nm (optional 280 nm to 1100 nm)
|Light exit port||
20 mm diameter
see download section
Quartz halogen lamp with diffuse reflector
Active air flow at the lamp socket through exhaust and pressure fans
Two sockets for the lamp current. Jack plug for the fans
UMPA-1.0-HL adapter for direct mounting onto the UMPF-1.0-HL port frame
Calibration of the spectral luminous flux with calibration certificate
+5 °C to +40 °C
|spectral radiant power|
|Produktname||Product Image||Description||Show product|
|ISD-21-BTS256-LED||System for the luminous flux and light color measurement of individual 2π light emitting diodes up to 63.5mm.
Features: Integrating sphere with 21cm diameter and auxiliary lamp, compact spectral light meter with Bi-Tec sensor for acurate measurement of the luminous flux, spectral radiant power, CCT, CRI, chromaticity coordinates, etc.
|ISD-50-BTS256-LED||System for the luminous flux and light color measurement of individual 2π light emitting diodes up to 100mm.
Features: Integrating sphere with 50cm diameter and auxiliary lamp, compact spectral light meter with Bi-Tec sensor for acurate measurement of the luminous flux, spectral radiant power, CCT, CRI, chromaticity coordinates, etc.
|ISD-50HF-BTS256-LED||System for the luminous flux measurement of 4π (optional 2π and 4π) light fixtures inside a sphere.
Features: Integrating sphere with 50cm hemispherical shell for opening and closing and auxiliary lamps. Light meter with Bi-Technology sensor for acurate measurement of luminous flux, spectral radiant power, CCT, CRI, chromaticity coordinates, etc.
|ISD-100HFT-BTS256-LED||System for the luminous flux measurement of 2π and 4π light fixtures.
Features: Turnable Integrating sphere with a 1000 mm diameter, extra measurement ports for 2π luminaires with diameters of up to 254mm and auxiliary lamp. Light meter for acurate measurement of luminous flux, spectral radiant power, CCT, CRI, chromaticity coordinates, User software, etc.
|ISD-100HFT-BTS2048-VL||System for the luminous flux and light color measurement of individual 2π and 4π light light sources.
Features: Turnable Integrating sphere with 100cm diameter, auxiliary lamp and a hemispherical shell for opening and closing, compact spectral light meter with Bi-Tec sensor for acurate measurement of the luminous flux, spectral radiant power, CCT, CRI, chromaticity coordinates, etc.