Small artificial star 50 um (Geoptik 30A026)

50 µm artificial star (Geoptik, SKU: 30A026). The artificial star allows telescope collimation checks and optical tests without waiting for the night sky. LED light is fed into a 50 µm optical fibre to form a small point of light. The white-light version has an ON/OFF switch and no brightness adjustment.
 
For checking collimation and assessing image asymmetry, including signs of astigmatism or coma, a shorter distance can be used if the telescope can reach focus. This may require additional focuser extension tubes. When assessing spherical aberration, the source must be sufficiently far away: a finite distance itself affects the test result, and the required separation depends on the telescope’s design and parameters.

Key features

• point of light formed by a 50 µm optical fibre
• white LED light source with an ON/OFF switch
• powered by the included 9 V battery
• photographic tripod attachment via a 1/4" thread

Included items

• a Geoptik 50 µm 30A026 artificial star
• battery: 9 V

Technical specifications

• optical fibre / light point diameter: 50 µm
• light source: LED
• light colour: white
• brightness adjustment: no
• power supply: 9 V battery
• tripod attachment: 1/4" thread
• dimensions: 96 × 61 × 25 mm
• warranty: 24 months

The artificial star provides a setup for checking collimation and testing optics while allowing for the required distance from the telescope.