Product description:
3.5V Streak Retinoscope Halogen OPTI+<br /><br />Optical Specifications<br /><br />Rotation<br />= 190°<br /><br />Distance from the device to which the real imagea of the lamp filament is adjustable<br />= 450 mm<br /><br />Distance from the device to which the virtual imagea of the lamp filament is adjustable<br />= 450 mm<br /><br />Length of streak imageb<br />= 30 mm<br /><br />Width of streak imageb<br />= 1.5 mm<br /><br />Deviation from linearity of the streak image at the focusb.<br />= 2 mm<br /><br />Rotation decentring of centre of streak imageb.<br />= 10 mm<br /><br />a All distances are measured from the light exit of the device<br />b When focus at 500 mm<br /><br /><br />Electrical Specifications<br /><br />Bulb<br />3.5 V 2.7 W<br /><br />Operation mode<br />Intermittent, on-time should not exceed 2 min with off-time not less than 5 min<br /><br /><br />Environment Requirements<br /><br />Operation<br />Environment Temperature<br />+10 C - +35 C<br /><br />Relative Humidity<br />30% - 75%<br /><br />Atmospheric Pressure<br />700 hPa - 1060 hPa<br /><br />Shipping<br />Common Conveyance<br /><br />Storage<br />Environment Temperature<br />-40 C - +55 C<br /><br />Relative Humidity<br />10% - 90%<br /><br />Atmospheric Pressure<br />500 hPa - 1060 hPa