Not so long ago, professional dentists, jewelers, cartographers, electronic engineers began to widely use a magnifying glass with a headlamp. In this material we will try to consider the most pressing issues that arise when choosing such a specialized device.
Increase
The standard headband magnifier has a magnification of 2.5 times. Such models are in demand not only in dentistry, but also in other areas of medicine. The specified increase is optimal not only for beginners, but also for experienced users.
For some areas, such as electronic engineering and microsurgery, a binocular forehead magnifier with a higher degree of magnification is required. In devices from leading manufacturers, this indicator can exceed the standard parameter up to 6 times.
Focusing
The headband magnifier should be selected depending on the working distance and the range in which the picture remains sharp. Currently, devices are available on the market whose working distance is in the range of 250 to 520 mm. The choice of the optimal solution depends not only on the overall workmanship, which distinguishes the headband, but also on the nature of the manipulation of the device and the user's needs.
As for the depth of focus, you can determine the indicator by measuring the farthest and closest point at which the image remains sharp. Functional headband allows you to create the desired focus by changing settings.
line of sight
This implies an area that must be clearly seen during operation of the device when performing a certain job. In order for the head magnifier to provide a wide
field of view, it is worth paying attention to the products of reputable brands. The ergonomics of cheap models make the user’s abilities quite limited.
Tilt angle
In addition, in order to make the forehead magnifier as convenient as possible, it is worth paying attention to devices with the possibility of changing the angle of inclination.
So, if the user has to lower his chin when using the device, this indicates an insufficient angle of inclination of the magnifier. When during operation of the device to form a clear, sharp image you need to throw your head back - the angle of inclination is excessively large.
The ideal solution is a head-mounted magnifier, which does not force the user to strain his eyes and neck in the process.
Lighting
To complete the headlamps, mainly LED lighting elements are used. In particular, coaxial lamps provide the most uniform white light that does not cause eye strain.
Headlamps, which are used in the field of dentistry, are often equipped with yellow light filters. Contact of such rays on elastic composite materials does not cause their premature hardening.
However, even the brightest LEDs, located in an unsuccessful position, are able to leave work areas unlit. To avoid such inconveniences, it is worth giving preference to headlamps with lamps fixed in the nose bridge area of the user.
Useful Tips
When buying a headband magnifier, you should pay attention to the following recommendations:
- First of all, you need to determine the level of increase. The smaller the parameter, the greater the clarity of the image when covering a wide field of view.
- The choice of a magnifier according to the working distance should be made taking into account individual needs and operating conditions.
- The ease of use of the head magnifier largely depends on the type of mount. It can be a standard hoop, an ergonomic frame or a helmet.
- Extremely important when using a magnifier is the presence of built-in coaxial lighting, which is particularly bright and the ability to form a clear focus.
Benefits
Headbands have a host of advantages over handheld magnifiers. First of all, devices of this category free up the user's hands. Illuminated devices are ideally suited for working with printed circuit boards, clock mechanisms, performing the finest wood carvings, embroidery.
The most functional devices offer great opportunities for adjusting focus, changing the angle of inclination, and sharpening. Some models are equipped with laser pointers, which allow you to concentrate on the necessary details during the work.