The lens meter plays a very important role in the scientific production of glasses, so it is of great value to ensure the accuracy and reliability of the lens meter. Today I will share "Daily Maintenance and Repair of Focimeter".

The lens meter is mainly used to measure the vertex power and prism power of spectacle lenses (including contact lenses), determine the axial direction of the cylinder lens of cylindrical lenses, print marks on uncut lenses and check whether the lenses are correctly installed in the frame in the instrument. The spectacle meter used by the glasses practitioners in the past has basically been eliminated, and the measuring instrument replaced by it is the lens meter.

With the increasing number of users, we found that many users are not familiar with the focus meter, and will cause unnecessary troubles due to lack of daily maintenance when using it.

To this end, I would like to share a few points about the daily maintenance of the lens meter:

1. Precautions for use environment

The lens meter should be used indoors, without direct sunlight and installed in a level and stable place that is not easy to get wet. Due to the limited store area, many optical shops usually put edge grinding machines, slotting machines and other processing equipment together. Over time, the water spray and dust generated when the edger is working will stick to the focal meter, which will easily cause a short circuit of the instrument and cause a circuit failure. So the focal meter should be placed away from the processing equipment. When using the focal meter, you should pay attention to whether it is affected by the light of the store display cabinet to ensure the normal operation of the machine.

2. Precautions during use

The instrument is turned on and warmed up. Before use, check whether the optical path is unobstructed, otherwise it will lead to failure to enter the measurement interface normally. If the interface cannot be entered normally or an error is reported, check whether the protective cover on the lensometer measurement support is covered. There are also some older lensmeters that have been used for a long time, and the spring of the dot needle is loose and naturally droops, which blocks the optical path and causes abnormal startup.

3. Maintenance of protective glass

When in use, if you find that the lens meter display mark keeps moving or moves slowly or abnormal data, you should check whether the lens support seat is stable and whether the lens clamp is loose. Next, check whether there is any foreign matter on the focus cover, take out the focus cover, and observe whether there is dust on the lower protective glass. If you find any foreign matter blocking, you can blow off the dust with an air blower, if you still find that it cannot be removed, you can wipe it with a clean and soft eye cloth.