OL 245U 45-W Irradiance Standard (Seasoned) - Optronic Laboratories

OL 245U 45-W Irradiance Standard (Seasoned)

The OL 245U is a 45-W Seasoned Irradiance Standard lamp. These lamps have tungsten coiled-coil filaments enclosed in a small quartz envelope.

The OL 245U uses the OL 410-150 Precision Lamp SourceOL 57 Lamp Holder and the OL 63 Adjustable Lamp Holder Mount.



The OL 245U is a 45-W Seasoned Irradiance Standard lamp. These lamps have tungsten coiled-coil filaments enclosed in a small quartz envelope.

The Spectral Irradiance standards issued by Optronic Laboratories are based on the National Institute of Standards and Technology (NIST) Spectral Irradiance Scale
for the wavelength range of 250 to 2400 nm and on a blackbody for the wavelength range above 2400 nm. The NIST Scale has an uncertainty (k=2) of 0.63% in the visible, 1.56% in the ultraviolet at 250 nm, and 0.31% in the infrared at 2000 nm.

@ 250 nm (W/(cm²nm)): 2 x 10-10
@ 1050 nm (W/(cm²nm)): 9 x 10-7
**Measured at 50 cm



± 1-2%


± 1%
*Uncertainty is relative to NIST Scale at k=2

≤ ± 0.06% / hr



OL 410 Precision Lamp Source

OL 410-150 Precision Lamp Source (150 W)

The OL 410 is a microprocessor-controlled, precision DC lamp source specifically designed to accurately operate tungsten filament lamp standards...



Optronic Laboratories warrants that the standard lamp supplied will be of the kind described or in any specification and drawings approved by Optronic Laboratories and will be free from defects in material and workmanship for 50 hours of use or one (1) year from the date of certified calibration by the original Purchaser, whichever occurs first.* During this period, Optronic Laboratories will at its option either repair, recalibrate, or replace any goods that are found to be defective in material or workmanship, provided the goods are returned to Optronic Laboratories in Orlando, Florida, with all shipping, insurance, and delivery charge prepaid (DDU Orlando, Florida). This Warranty does not extend to batteries, fuses, and glass phototubes (if any), or other items of limited durability, nor does this warranty cover damage to goods caused by leaky or otherwise defective batteries, by Purchaser use of improper batteries and by misuse or abuse, unauthorized alteration, excessive line voltage, excessive temperatures (above 160 degrees F), extreme environmental conditions (such as extremely dusty or wet environment), corrosive atmospheres or servicing by unauthorized personnel. The items returned shall only be accepted when accompanied by a written statement setting forth the nature and suspected cause of the alleged deficiencies. After the initial one (1) year warranty, repairs performed by Optronic Laboratories are covered under a limited ninety (90) day warranty. The warranty repaired (or recalibrated, or replacement) items will be returned DDU to customer. THERE ARE NO OTHER WARRANTIES, EXPRESS OR IMPLIED, (INCLUDING THE WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE OR IMPLIED WARRANTY OF MERCHANTABILITY) OTHER THAN THE WARRANTY SET FORTH HEREIN.