What is a headband? Tips for choosing
Not so long ago professional dentists, jewelers, cartographers, electronics engineers began to widely use a headlamp magnifier with illumination. In this article we will try to consider the most pressing issues that arise when choosing such a specialized device.
The standard headlamp has a magnification of 2.5 times. Such models are in demand not only in dentistry, but also in other fields of medicine. This increase is optimal not only for beginners, but also for advanced users.
For some areas, such as electronic engineering and microsurgery, a binocular loupe magnifier is required with a higher degree of magnification. In devices from advanced manufacturers, this indicator can exceed the standard parameter up to 6 times.
The headband should be selected depending on the working distance and the range in which the picture remains sharp. At present, devices are on the market, the working distance of which is in the range from 250 to 520 mm. The choice of the optimal solution depends not only on the overall quality of the manufacturing process, which is distinguished by the headlamp, but also on the nature of the manipulations with the device and the needs of the user.
As for the depth of focus, you can determine the indicator by measuring the farthest and nearest point in which the image remains sharp. Functional headlamp allows you to generate the desired focus by changing the settings.
line of sight
Here we mean an area that must be clearly seen during the operation of the device when performing certain work. To ensure that the headlamp provides a wide field of view, it is worth paying attention to the products of authoritative brands. The ergonomics of cheap models make the user's capabilities quite limited.
In addition, in order for the headband to be as convenient as possible to use, you should pay attention to the devices with the ability to change the angle of inclination.
So, if using the device the user has to lower the chin, this indicates an insufficient angle of the magnifying glass. When, during the operation of the device, you need to tilt your head to form a clear, sharp image - the angle of inclination is excessively large.
An ideal solution is a head-mounted magnifier, which does not force the user to overstrain the eyes and neck during work.
For the assembly of headlamps mainly LED lighting elements are used. In particular, coaxial lamps allow you to get the most uniform white light that does not cause eye strain.
Headless loupes, which are used in the field of dentistry, are often equipped with yellow light filters. The contact of such rays with elastic composite materials does not cause their premature hardening.
However, even the brightest LEDs located in an unsuccessful position are able to leave the working areas unlighted. To avoid such inconvenience, give preference to headlamp devices with lamps fixed in the nose of the user.
When buying a headband you should pay attention to the following recommendations:
- First of all, it is necessary 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 selection of the magnifying glass according to the working distance should be made taking into account individual needs and operating conditions.
- The ease of operation of the headlamp largely depends on the type of attachment. This can be a standard hoop, an ergonomic frame or a helmet.
- Extremely important when using a magnifying glass is the presence of built-in coaxial illumination, which is characterized by a special brightness and the possibility of forming a clear focus.
Headlamps have a lot of advantages compared to manual magnifying devices. First of all, devices of this category free the user's hands. Devices with illumination are ideal for working with printed circuit boards, clockwork, performing the finest wood carving, embroidering.
The most functional devices open wide possibilities for adjusting the focus, changing the angle of inclination, sharpening. Some models are equipped with laser pointers, which allow you to concentrate on the right parts during the work.