Interference fringes of Sodium D-lines
Spectrum of Sodium lamp
Features
Ground glass & diaphragm supplied
Output of 20 W
Housing, support base with post, and power supply included
Height of lamp adjustable with post/post holder
Introduction
The LLE-2 Low Pressure Sodium Lamp is a widely used discharge lamp that emits light primarily at 589 nm and 589.6 nm, which are ideal for wavelength calibration and resolution regulation in optical instruments. It is commonly used in spectroscopy, astronomy, and laboratories for precise wavelength measurements.
Upon activation, the lamp initially emits a dim pink light as it warms up the sodium metal, which eventually vaporizes and transitions to a bright orange light. This characteristic yellow-orange glow is the result of the emission lines at 589 nm and 589.6 nm, which are crucial for various optical applications. However, it is important to note that the lamp requires a warm-up period of approximately ten minutes before it reaches its full light output. Additionally, the lamp must cool down before it can be restarted.
Specifications
| Description | Specifications |
| Power | 20 W |
| Operating Voltage | 20 VAC |
| Operating Current | 1 ~ 1.3 A |
| Base Type | E27 |
| Dimension of Bulb | 28 mm in OD, 155 mm in length |
| Dimension of Housing | 50 mm (dia), 195 mm in length |
| Dimension of Windows | 2 opposite windows: 30 mm (height) x 16 mm (width) |
| Range of Height Adjustment | 150 mm to 260 mm |
Part List
| Description | Qty |
| Sodium bulb | 1 |
| Housing with base and post | 1 |
| Power supply | 1 |
| Window barrier | 1 ground glass, and 1 metal plate with a pin hole |
| Power cord | 1 |
Interference fringes of Sodium D-lines
Spectrum of Sodium lamp
