Dimensional Specifications and Layout

• OL 200
• OL 220
• OL 245

The OL FEL standard a is a 1000-W FEL type lamp which is calibrated over all or part of the 250 to 4500 nm wavelength range. The lamp bases have been converted to a medium bi-post base as recommended by the National Institute of Standards and Technology (NIST). This special lamp base improves alignment accuracy which minimizes uncertainties due to positioning and orientation of the lamp. The OL FEL can be obtained with two levels of accuracy: high accuracy and super high accuracy. The High Accuracy Standards of Spectral Irradiance have a transfer uncertainty relative to the NIST Scale of ±1%. The Super High Accuracy Standards have a transfer uncertainty relative to the NIST Scale of ±0.5%. Illuminance, color temperature and chromaticity values are also supplied with those standards calibrated over the visible spectrum.

Refer to Bulletin 53 for further info on:

• Performance Specifications
• Calibration Options
• Optional Accessories
• Method of Calibration

OL FEL Dimensional Specifications and Layout
OL 61 Lamp Holder with OL FEL Lamp

OL Series 100
Solar Constant Irradiance Standard

The OL 100 consists of a 1000-W tungsten-halogen lamp mounted in a slip-cast, fused silica reflector. The diffuse reflector increases the irradiance by a factor of about three. The standard can be obtained with calibrations for spectral irradiance over the wavelength range of 300 to 2500 nm and for total irradiance. The total irradiance of the OL 100 is on the order of 136 mW/cm2.

Refer to Bulletin 3 for further info on:

• Performance Specifications
• Calibration Options
• Optional Accessories
• Method of Calibration

The OL UV-40 consists of a stable, 40 Watt deuterium lamp with a fused silica window. The UV standard has a peak irradiance around 200 nm and is calibrated over the range of 200 to 400 nm.

Refer to Bulletin 33 for further info on:

• Performance Specifications
• Calibration Options
• Optional Accessories
• Method of Calibration

OL Series 752-10
Plug-In Standard of Spectral Irradiance

The OL Series 752-10 consists of a pre-aligned, tungsten-halogen lamp calibrated for spectral irradiance over all or part of the 250 to 2500 nm wavelength region. The standard mounts directly to the integrating sphere cosine collector of the OL Series 754 and OL Series 750 Spectroradiometers. The plug-in/pre-aligned concept eliminates tedious and time consuming set-up and alignment procedures that are normally associated with spectroradiometric calibrations.

Refer to Bulletin 107 for further info on:

• Performance Specifications
• Calibration Options

The OL 752-12 consists of a prealigned, deuterium lamp standard calibrated for spectral irradiance over 200 to 400 nm wavelength region. The standard mounts directly to the integrating sphere cosine collector of the OL Series 754 and OL Series 750 Spectroradiometers.

Refer to Bulletin 107 for further info on:

• Performance Specifications
• Calibration Options

The OL 345 Calibration Standard consists of a 45 Watt tungsten-halogen lamp and a removable flashed opal diffuser mounted in an air-cooled cylindrical housing. With the diffuser in place, the uniformly radiating 15.5 cm2 source serves as standard of spectral radiance over the wavelength range of 350 nm to 1100 nm and as a standard of luminance. When the diffuser is removed, the OL 345 serves as a standard of spectral irradiance over the 250 to 2500 nm wavelength region and as a standard of illuminance.

Refer to Bulletin 43 for further info on:

• Performance Specifications
• Calibration Options
• Applications

Dimensional Specifications and Layout

• OL 345