3.5V Streak Retinoscope LED model INS-11091-4-O

• Makes refractions easier than ever by producing one of the brightest, sharpest, and cleanest streaks available.
• Provides 2.8X LED
• Superior streak quality enables easier and quicker refractions – even in patients with small pupils
• Crossed linear polarizing filter eliminates bothersome glare from trial lenses, helping you perform a more precise exam
• External focusing sleeve improves comfort and maneuverability
• Sealed optics keep the lenses cleaner for more effective exams
• Fits all Welch Allyn 3.5 V power sources

Optical Specifications

Rotation
= 190°

Distance from the device to which the real imagea of the lamp filament is adjustable
= 450 mm

Distance from the device to which the virtual imagea of the lamp filament is adjustable
= 450 mm

Length of streak imageb
= 30 mm

Width of streak imageb
= 1.5 mm

Deviation from linearity of the streak image at the focusb.
= 2 mm

Rotation decentring of centre of streak imageb.
= 10 mm

a All distances are measured from the light exit of the device
b When focus at 500 mm


Electrical Specifications

Bulb
3.5 V 2.7 W

Operation mode
Intermittent, on-time should not exceed 2 min with off-time not less than 5 min


Environment Requirements

Operation
Environment Temperature
+10 C - +35 C

Relative Humidity
30% - 75%

Atmospheric Pressure
700 hPa - 1060 hPa

Shipping
Common Conveyance

Storage
Environment Temperature
-40 C - +55 C

Relative Humidity
10% - 90%

Atmospheric Pressure
500 hPa - 1060 hPa