Fig. 1 Emissivity of 67030/31 Blackbody at 1000 °C, 0.5 inch (12.7 mm) aperture.
Fig. 2 Irradiance of Oriel Blackbodies at various cavity temperatures.1050°C and 1200°C temperature systems
1.0-inch diameter cavity aperture
High temperature stability
High emissivity
Built-in aperture wheel
Our Blackbodies are highly uniform, temperature stable calibrated sources of infrared radiation, traceable to NIST standards. We offer various models differing in temperature range and cavity material.
We offer Blackbodies with a 1.0-inch (25.4 mm) cavity aperture. These models have an internal fan that maintains the sources at a cool temperature, allowing them to be handled.
These sources emit blackbody radiation by multiple reflection, absorption and re-emission of the thermal energy. The thermal energy of the cavity is provided by a ceramic sealed heater coil that uniformly heats the cavity cylinder to temperatures from 50°C to 1050°C or 50°C to 1200°C, depending upon the model of blackbody. The lower temperature models use a stainless steel cavity; the higher temperature model uses a silicon carbide cavity.
Our 1.0-inch (25.4 mm) diameter cavity Blackbodies include an 8-position aperture wheel with 7 apertures and 1 open position. The aperture sizes are listed in Table 1.
| Aperture Size | |
|---|---|
| (inch) | (mm) |
| 0.6 | 15.2 |
| 0.4 | 10.2 |
| 0.2 | 5.1 |
| 0.1 | 2.5 |
| 0.05 | 1.3 |
| 0.025 | 0.64 |
| 0.0125 | 0.32 |
Fig. 1 Emissivity of 67030/31 Blackbody at 1000 °C, 0.5 inch (12.7 mm) aperture.Fig. 2 Irradiance of Oriel Blackbodies at various cavity temperatures.
Each Blackbody system is comprised of the blackbody cavity and a controller. The controller ensures accurate temperature control and displays the blackbodies\' operating parameters. It controls the cavity\'s temperature using the Proportional, Integral and Derivative parameters (P.I.D.) of the source, to provide stable temperature control, fast response time, and prevention of excessive settling time and overshoot. All adjustments, parameters and indications are accessible from the front panel. The front panel contains 7 LEDs for visual indication of pertinent controller activity plus a large LED display of blackbody temperature, and an interactive LCD menu display for presentation and parameter setting.