Leica dm750 p manual ϘϘ It is very important to avoid the excessive, Around the lens

General maintenance (cont.)

ϘϘ Keeping all optical components clean is important for maintaining good optical performance.

ϘϘ The microscope should always be covered with the plastic dust cover (provided with the instrument) when it is not in use.

ϘϘ If any optical surface becomes coated with dust or dirt, clean the surface by blowing it off with a syringe or brushing it off with a camel hair brush before attempting to wipe the surface clean.

ϘϘ Optical surfaces should be cleaned with a lint-free cloth, lens tissue or a cotton swab moistened with methanol or commercially available glass cleaner. Do not use alcohol.

ϘϘ It is very important to avoid the excessive		concave front lens of fairly short radius or
use of solvent, so use them sparingly. The		curvature. The surface of this front lens can
lint-free cloth, lens tissue or cotton swab		be readily cleaned with a toothpick covered
should be moistened with solvent, but		with a cotton tip, or with a small cotton
not be wet enough for the solvent to seep		swab. Moisten the cotton with metha-
around the lens.		nol and squeeze it almost dry. Wipe the
		front lens lightly without applying undue
ϘϘ No part of the microscope is quite so vulner-		force or scrubbing action. Make sure that
able to collecting dirt, dust, and oil as the		the cotton tip contacts the concave lens
front lens of the objective. Whenever you		surface. Check the objective with a magni-
encounter lack of contrast, cloudiness or		fier after cleaning.
poor definition, carefully check the condi-
tion of the front lens with a magnifier.		ϘϘ If you need to remove the microscope’s
		viewing body, be careful not to accidentally
ϘϘ The lower	magnification objectives have	touch the outer lens surface (located on
fairly large front lenses and can be cleaned		the underside of the body). Fingerprints on
with a cloth or lens tissue wrapped around		this surface will reduce image clarity. This
a finger and	moistened with methanol. Do	lens can be cleaned in the same manner as
not use alcohol.		objectives and eyepieces.

ϘϘ Cleaning 40× and 100× objectives requires more care. Note: To achieve the high degree of flatness obtained with the higher magni- fication objectives, the objective has a small

Leica DM750 P Manual 40