Head magnifying glass has holding device to put on head or glasses, magnifying lens and at least one swivel piece to deflect path of beam or to enhance refractive power of lens

摘要

Head magnifying glass (2) has holding device (1) put on the user's head or glasses, magnifying lens (3) which is fixed to the holding device and has at least one swivel piece (7) which can deflect the path of the beam into the magnifying lens. It can also contribute or determine the refractive power of the magnifying lens. The magnifying lens has at least one optical element (5,6) which can carry out two different optical functions. The swivel element has one or two curved mirrors. The magnifying lens has a refractive element placed between the mirrors. It can be embodied as a diffractive element in order to defract the beam when not set at a zero position.