Download
Share
Print this page
luxvision LM 300 User Manual
  1. Manuals
  2. Brands
  3. luxvision Manuals
  4. Measuring Instruments
  5. LM 300
  6. User manual

luxvision LM 300 User Manual

Lensmeter
Hide thumbs

Advertisement

Quick Links

Download this manual
USER'S MANUAL
LENSMETER
LM 300

Advertisement

loading
Need help?

Need help?

Do you have a question about the LM 300 and is the answer not in the manual?

Questions and answers

Related Manuals for luxvision LM 300

Summary of Contents for luxvision LM 300

  • Page 1 USER’S MANUAL LENSMETER LM 300...
  • Page 2 Notification Dear Users, Thank you for your purchase of LM 300 Lensmeter. Please take time to read our user’s manual carefully before use. This guarantees you to make full use of this unit and prolongs the operation life of this unit.

  • Page 3: Table Of Contents

    Content Function Introduction ..................4 Working Principle Device ................4 Functions ......................5 Operation ......................8 Maintenance ....................18 Common Trouble Shooting ................19 Specifications ....................20...

  • Page 4: Function Introduction

    1. Function Introduction This device is divided into two models, A and B, in which A is standard model and B is strengthened model with prism compensator. In the following description, all sections or content marked with “*” before them are specialized content of model B device.

  • Page 5: Functions

    This device consists of a coaxal optic system. Light sent forth from 1-Light Source (LED) lights up 2-Mark Dividing Plate. After passing though 3-Measurement Objective and 5-Telescopic Objective, 2-Mark Dividing Plate is imaged at position of 6-Eyepiece Dividing Plate. At this time, through 7-Eyepiece Set, the distinct reticule images of 2-Mark Dividing Plate and 6-Eyepiece Dividing Plate can be seen.
  • Page 6 1. Eyepiece Eyepiece part is a screw type focusing unit with focusing range of ±5D, adaptable to different eye-sights of human eyes. *2. Prism Compensator It is used to measure prism lens with prism degree bigger than 5∆. 3. Lens Pressing Mechanism 3 plastic pressing feet equipped with spring are used to press lens, able to stably press lens with any shape of surface, with no damage to lens surface.
  • Page 7 12. Lens Pushing Hand Lever It is used to move lens pushing board back and forth. 13. Diopter Measuring Hand-wheel Drone and Eyepiece Dividing Plate (Fig.4) Round-dot drone Cross-line drone Fig. 4 14. Liquid Crystal Display Screen It displays diopter value of the measured lens. 15.

  • Page 8: Operation

    Liquid Crystal Display Screen (Fig 5) Fig. 5 17. Reset Key RST Pressing this key, it returns from other mode of measurement to the mode ready to Operate. 18. Measurement Switching Key +/ When cylindrical lens is measured, pressing this key will realize switching of light intensity of cylindrical lens degree.
  • Page 9 ready to operate (Fig.6). Turn diopter measuring hand-wheel. When digitals appearon the display screen, it indicates the device is put in mode of spherical lens measurement. Important Prompt Be sure to install measurement bearing seat correctly, otherwise it will result in imprecise measurement.
  • Page 10 To obtain most precise measuring result, the better way is to turn diopter measuring hand-wheel in one-way, with rotating direction of: - 25D +25D. 4.1.2 Putting Lens in Position 1. Lens shall be placed on measurement bearing seat with concave facing downwards (Fig.8).
  • Page 11 Measurement of Lens 4.2.1 Measurement of Spherical Lens 1. Confirm the mode of cylindrical lens measurement, and turn diopter measuring hand-wheel to obtain distinct drone focus. Prompt If it is mode of cylindrical lens measurement, press measurement switching key S/C to switch it to mode of cylindrical lens measurement, the device will sends out sound of “DuDu”...
  • Page 12 are weakest refractive power and strongest refractive power on two mutually vertical sections. When this device is used to measure such kind of lens, two long green lines and three long green lines of drone cannot be focused to be clear simultaneously. Measurement shall be conducted according to following procedures: 1.
  • Page 13 7. Turn diopter measuring hand-wheel to obtain clearest focus of 3 long green lines of round dot drone and cross-line drone. At this time, spherical diopter (SPH), astigmatism degree (CYL) and astigmatism axis (AXIS) of this lens are shown on the liquid crystal display screen (Fig. 13). Fig.
  • Page 14 2. Press measurement switching key S/C to switch it to mode of cylindrical lens measurement. 3. Lightly move lens so that near vision part of bifocal lens (i.e. small lens) is placed on measurement bearing seat (Fig. 15), and drone is moved to center of eyepiece visual field.
  • Page 15 4.2.4 Measurement of Prism Lens Measuring prism degree of prism lens consists of 2 ranges: 0 ~ 5 degrees and 5 ~ 20 degrees of prism. 1. In the range of 0 ~ 5 degrees of prism, the value is read directly on the eyepiece dividing plate.
  • Page 16 Matters Needing Attention If drone is not in eyepiece visual field, turn angle of prism compensator to 0° or 90°, and turn adjusting knob of prism compensator to the left or right to make measurement easy. C. Turn diopter measuring hand-wheel to obtain clearest focus of drone. D.
  • Page 17 2. Lightly move lens so that drone is at center of eyepiece visual field. 3. Make 3-dot mark using dot-making mechanism. 4.3.2 Calibration of Cylindrical Lens 1. Turn astigmatism turning hand-wheel to show required angle on the liquid crystal display screen. 2.

  • Page 18: Maintenance

    dormancy. To resume measurement, press any measuring key, or turn diopter measuring hand-wheel. Prompt When the device is in the state of automatic dormancy, the measured data will not been liminated. Setting Grades of Measurement Measuring grades of this device involve 4 grades: 0.01D, 0.06D, 0.12D and 0.25D. By pressing adjusting key ADJ first, and then pressing measurement switching key +/-, one can see these 4 grades of measurement (0.01D, 0.06D, 0.12D and 0.25D) are switched in circulation.

  • Page 19: Common Trouble Shooting

    dipped with mixed solution of ethanol and aether. Matters Needing Attention For cleaning the device, do not use organic solution such as paint thinner, otherwise surface of the device will be damaged. 6. Common Trouble Shooting Failure Reasons of Failure Solutions Liquid crystal Lamp is not lighted...

  • Page 20: Specifications

    7. Specifications Range of diopter measurement Spherical lens -25D ~ +25D Cylindrical lens -9.99D ~ +9.99D Space of readings 0.01D, 0.06D, 0.12D, 0.25D Astigmatism axis angle of cylindrical lens 0 ~ 180° space of readings: 1° Model A 0 ~ 5 ∆ space of readings: 1 ∆; Prism degree * Model B 0 ~ 20 ∆...
  • Page 21 LUXVISION, Inc. shall not be liable for any errors or for incidental or consequential damages in connection with the furnishing, performance, or use of this manual or the examples...