See Also: Bertrand lens(medicine)
lens, Bertrand(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
Russell, Bertrand(dictionary)
Bertrand (as used in expressions)(encyclopedia)
Aristide, Jean-Bertrand(encyclopedia)
Bertrand, Ivan Georges(medicine)
Canavan-van Bogaert-Bertrand disease(medicine)
Beauvoir, Simone (Lucie-Ernestine-Marie-Bertrand) de(encyclopedia)
Medicine Lodge Memorial Hospital- Medicine Lodge(health)

lens, Bertrand (medicine)


lens, Bertrand
<microscopy> A small convergent lens placed between objectives and eyepiece. The lens focuses an image of the upper focal plane of the objective on the focal plane of the eyepiece. It is chiefly used with polarized light for inspecting the interference figure. It is also convenient for quickly verifying centreing, size, and uniform illumination of an aperture.