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HUMPHREY Model 350 Lensometer

Description

Specifications

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Information Provided By:
Range of Applicability to Lens Types

Spectacles: single, bifocal, trifocal, aphakic, and progressive addition lenses
Contacts: hard and soft
Tints and Coatings: scratch resistant. UV and anti-reflective coatings and tints down to 5% luminous transmittance
Refractive materials: all commercially available
Lens diameter: 7mm to 100mm
High Index Correction: corrects calibration for high-index materials due to dispersion difference in response to operator input of appropriate Abbé value
Performance

Sphere: -20D to +20D
Increments: .01D, .12D, .25D
Cylinder: -20D to +20D
Increments: .01D, .12D, .25D
Axis: 1° to 180°
Increments: 1°
Prism: -15D to +15D
Increments: .01D, .12D, .25D
PD: 0 to 90mm
Increments: .5mm
Operator Interface: Output

Video Display: 9° diagonal, white phosphor CRT
- Resolution: 640 x 480 pixels
- 16 level grayscale
Paper size: 58 mm thermal paper
Audible prompts and indicators
Operator Interface: Input

Function buttons
Foot Switch for STORE function
STORE button
Light source: wavelength: 660nm
- Type: LED
- Measurement pattern size: 5mm
- (or diagonal): 3.5 mm (contact lens/PAL)

Operating conditions: +10°C to +40°C, 20% to 90% relative humidity
Storage conditions: -40°C to +70°C, 0% to 90% relative humidity (non-condensing)
Electrical

Line voltage: 100 to 240V AC
Frequency: 47 to 63 single phase
Power: 100V
Fuse rating: 3A fast Blow, 250V, 5 x 20mm
Current leakage: Less than 100µA at 120V
Interfaces

Two RS-232 serial communication ports
Selectable baud rate: 300 to 19.2K

Discontinued by Carl Zeiss Meditec in 2004, the Humphrey Lens Analyzer is still considered by many as the best auto lensometer ever made. Sought after by lens manufacturing labs due to its durability and accuracy. Automatic calculation of mono and binocular PD without centering. Excellent with progressives and high index materials. Connects with Humphrey HARK 599 ARK to automatically set up corrected acuity comparison with patients present glasses.

 

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