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The Three-color Visual Targets Enables a Wide Range of CFF Tests
– The specialized equipment for CFF value measurement
– The three-color visual targets allows test of eye fatigue and optic nerve disease
– Easy operation with singlehand
– Continuous increase / decrease of the frequency at an interval of 1 Hz
– View angle of two degrees at the distance of 25 cm
Contents
HF-II, visual targets, 9V alkaline battery,
testing paper (50 sheets)
Power Source
9V alkaline battery
Frequency
1 to 79 Hz at an interval of 1 Hz.
Frequency Setting
By up and down push buttons
Accuracy of the frequency
Less than 0.01% (per setting)
Pulse Duty Ratio
50% square wave
Illumination Stability of Targets
Less than 10% (between 9V and 7V)
Warning lamp lights up at less than 7V
Dimensions
57 mm×58 mm×170 mm
Weight
240 g
Targets
LED dominant wavelength of targets:
Red = 660 nm, green = 555 nm, yellow = 570 nm.
Target size: Dia. 8.7mm
Dimensions: 70 mm x 76 mm x 37 mm
Weight: 145 g