OL 750 Measurement Systems Optronic Laboratories, Inc.
Outline of Presentation Ø About Optronic Laboratories, Inc. Ø The OL 750 Series Spectroradiometer Ø The OL Series 740 -20 Ø The OL 750 -75 MA and Specular Reflectance Measurements Optronic Laboratories, Inc.
About Optronic Laboratories, Inc. was established in 1970 by two eminent researchers at NIST (then NBS). Facilities were modeled after NIST, and Optronic Laboratories, Inc. achieved a worldwide reputation for excellence in light measurement and calibration. Continuing to work closely with NIST, the development of new instruments and techniques at Optronic Laboratories, Inc. constantly improves the accuracy and precision of light measurement. Optronic Laboratories, Inc.
About Optronic Laboratories, Inc. In 1998, Optronic Laboratories, Inc. moved into its new 25, 000 square foot purpose-built facility, consolidating and expanding production, R & D and calibration facilities. Optronic Laboratories, Inc.
About Optronic Laboratories, Inc. Optronic Laboratories’ instruments & services include: Ø Broad-band radiometers advice Training, consultation & Customization/new product Measurement services: & photometers: NIST-traceable calibration sources, Ø Sphere systems: Spectroradiometers: development diameter as standard materialspulsedfield portable sources, & detectors: § DC, AC, to 76” or modulated § from 1” materials & detectors laboratory & § from 200 nm to 30, 000 nm Optronic Laboratories, Inc.
The OL Series 750 Monochromators The heart of any spectroradiometric system is the monochromator, but… Ø It must give the right bandpasses – § Too large and spectra are distorted § Too small and signals are low Ø It must give high spectral purity (low stray light) so only the wavelength of interest is detected. Optronic Laboratories, Inc.
The OL Series 750 Monochromators Ø Available in single and double (shown) versions Ø F/4 optics for high throughput Ø Very low stray light Ø Numerous special features for most accurate results Optronic Laboratories, Inc.
The OL Series 750 Monochromators Tri-grating mounts change gratings automatically Ø Large range of gratings available Ø Optimized for high efficiency Ø Optimized for wide wavelength range Ø Optimized for high resolution Optronic Laboratories, Inc.
The OL Series 750 Monochromators Versatile plug-in chopper or filter wheel input accessories Ø Range of plug-in input accessories Ø Choppers (shown) for IR detectors Ø Automatic control of chopper speed and “open” position stop Ø Filter-wheel for input attenuation or filtering Optronic Laboratories, Inc.
The OL Series 750 Monochromators Blocking-filter wheel changes filters automatically Ø Fully automated 11 position blockingfilter wheel Ø Includes SHUT position for dark current readings Ø Optimized filters for widest wavelength range Optronic Laboratories, Inc.
The OL Series 750 Monochromators Blocking filters: how they work Ø Gratings diffract light at different angles Blocking depending on filter 400 nm wavelength + Ø 400 nm will also 800 nm diffract at the same 400 nm angle as 800 nm (since 2 x 400 = 800) Ø A blocking filter 800 nm removes the 400 nm so just 800 nm is left grating Optronic Laboratories, Inc.
The OL Series 750 Monochromators Light passes into the monochromator through the entrance slit, then onto the first collimating mirror. Optronic Laboratories, Inc.
The OL Series 750 Monochromators Collimated (parallel) light is directed onto the grating. Optronic Laboratories, Inc.
The OL Series 750 Monochromators The grating diffracts the light, sending each wavelength off at a different angle. The desired wavelength is collected by the first focussing mirror…. Optronic Laboratories, Inc.
The OL Series 750 Monochromators …which focuses it at the middle slit. A second collimating mirror collects this beam… Optronic Laboratories, Inc.
The OL Series 750 Monochromators …and collimates it onto a second grating. Since the second grating is linked to the first, they are at the same angle and hence the same wavelength. Optronic Laboratories, Inc.
The OL Series 750 Monochromators This second grating acts like the first, but the spectral purity is increased by many decades. Optronic Laboratories, Inc.
The OL Series 750 Monochromators The pure monochromatic light, at the wavelength desired, is then focussed onto the exit slit and emerges from the monochromator. Optronic Laboratories, Inc.
Other measurements Ø For transmission, reflection and detector response measurements, a light source at the entrance of the OL 750 creates monochromatic light at the exit. Ø The OL Series 740 -20 is an ideal light source for most applications. Optronic Laboratories, Inc.
The OL Series 740 -20 Light Sources Ø Single and double lamp versions Ø UV lamp § 200 nm to 400 nm Ø Tungsten lamp § 250 nm to 2500 nm Ø Glowbar § 1000 nm to 30000 nm Optronic Laboratories, Inc.
The OL Series 740 -20 Light Sources Ø Optics match the OL Series 750 Monochromators Ø Easy switching from one source … Optronic Laboratories, Inc.
The OL Series 740 -20 Light Sources Ø Optics match the OL series 750 monochromators Ø Easy switching from one source … …to the other i Fully automated switching available Optronic Laboratories, Inc.
The OL 750 + OL 740 -20 Ø 200 to 30, 000 nm coverage Ø Monochromatic light prevents sample heating Ø Suits a very wide range of standard OL accessories Ø Suits many existing and future applications Optronic Laboratories, Inc.
Reflectance Measurement Ø Reflectance can be specular (like a mirror) or diffuse (like paper). Ø Optronic Laboratories, Inc. manufactures a wide range of accessories for regular and diffuse transmittance. Ø To illustrate a specular reflectance measurement system, we will use the OL 750 -75 MA Goniometer Attachment. Optronic Laboratories, Inc.
The OL 750 -75 MA for Specular Reflectance Ø Measures direct beam for true absolute results without the need for standard mirrors Optronic Laboratories, Inc.
The OL 750 -75 MA for Specular Reflectance Ø Full 10° to 60° angle-of-incidence measurements Ø Detector tracks incidence angle or moves free to map other angles Optronic Laboratories, Inc.
The OL 750 -75 MA for Specular Transmittance Ø Transmittance at any angle, 0° to 60° Optronic Laboratories, Inc.
The OL 750 -75 MA for BRDF Measurements Ø Detector moves independent of incident angle for BRDF & BTDF measurements Optronic Laboratories, Inc.
The OL 750 + OL 740 -20 + OL 750 -75 MA If we put these together… Positive location & Easy assembly Optronic Laboratories, Inc.
The OL 750 + OL 750 -20 + OL 750 -75 MA Materials can be measured from 200 nm to 30, 000 nm Optronic Laboratories, Inc.
More Information Ø The systems illustrated represent just a few of the accessories from Optronic Laboratories, Inc. Ø For more information: § Contact your local Optronic Laboratories’ representative § Visit our website at www. olinet. com Optronic Laboratories, Inc.
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