Special instrument for measuring refraction deflection and astigmatism axis.
The well positioned filament can be rotated 360° and move upward and downward. Brightness of the streak can be adjustable.
Quickly and precisely measure the astigmatism axis.
The light can be converged, radiated and paralleled.
Automatic turning off effectively protects the bulb.
Two-steps adjustable illumination: S(Bright), W(Dark).
Working Distance: 1m
Adjustable Range of Streak: 0.2mm~0.4mm
Streak Rotation: 360°
Illumination Source: 3V/2.1W，Incandescent Bulb
Power Supply: AC 110~120(V)/220~240(V), 50/60Hz