DE1963157U - WINKELLUPE. - Google Patents

Description

<* OPTICAL WORKS G. RODENSTOCK MÖNCHEN

AnI. Sheet 1 'to the letter dated October 9th 6 4 to the GERMAN PATENT OFFICE Munich

Angle magnifying glass

The invention relates to a magnifying glass for viewing flat object surfaces, for example the screen of an image converter tube, wherein the beam path between the object plane and the lenses of the magnifying glass through a reflective surface at 90 ° or a similar angle is kinked. In particular, the present invention solves the problem of providing such a magnifying glass of greater than 10 times, in particular To create 15-fold magnification, the focal length of which is at most about '* -' equal to 1.7 times the distance between the last lens surface and the eye

and about as large as the diameter of the sharply reproduced Object field is so that the angle of view is about 50 °. The murmur * 'between the object level and the refractive links, i.e. the Thing focal length of the eyepiece is with glass or an equivalent filled the medium, expediently in the form of a reflective right-angled isosceles prism.

There is such a view of a longer focal length, that is, of a smaller magnification known, in which 5 individual lenses are provided in addition to the prism kinking the beam path. This is the danger of reflections and loss of light - 'not to be dismissed out of hand.

In contrast, the present invention represents an advantageous further development in that there are only three in the air Has lens members and connects a fourth lens member by cementing with the prism bending the beam path. A special one good image performance, especially the correction of chromatic and spherical errors, is given by the fact that the lens element connected to the prism has a further cemented surface has, that is, contains two lenses; the same applies to the meniscus-shaped curved member adjacent to the eye.

The image performance is further increased by the fact that none of the optical elements have a refractive index below 1.69, from the carrier glass for the luminescent screen melted into the image converter.

' to At

OPTICAL WORKS G. RODENSTOCK MÖNCHEN

AnI. Page 2 . to the letter dated 29.10.64 to the GERMAN PATENT OFFICE Munich

seen, which represents the object surface. Next are according to the invention the refractive index differences on the cemented surfaces with at least 0.05, preferably Ö, o7 in the eye side. with at least 0.10, preferred 0.15 to be measured in the putty part on the object side.

The data for a 15x magnifying lens according to the invention, 'shown in section in the figure are the following:

r, = 00

= 2.5 (carrier glass of the image surface)

ⁿ d-

r ₂ = 00

¹ I ^{= 0> 1}

Γ, = 00

^r 4 = °°

d ₂ = 6.5

d, = 34.1 (reflection prism)

r _5. = oo

Tf- +67.0

^d 4 =

d _c = 4.8

r ₇ -64, ο

= 1.5

) ^r 8 + 1710 +251 H = 5.4 ^d 6 +19.2 ^r 9 -42.9 ^d 8 = 0.1 H +10.0 ^r 10 +40.3 ^d 9 = 7.2 ^d 7 +10.27 ^r ll = 0.1 ^r 12 = 5.4 ' ^r 13 = 10.2 ^r 14

Interpupillary distance: 12.0

1.858 / 23.4 1.850 / 32.2 1.858 / 23.4 1,691 / 54.8

1.691 / 54.8

1.691 / 54.8

1.951 / 20.3 1.881 / 41.1

—4-.

Claims (4)

<OPTICAL WORKS G. RODENSTOCK MÖNCHEN '/ AnI. Sheet 3 ". To the letter of 29 * 10.64 to the GERMAN PATENT OFFICE Munich - Dr. Nau / Hm.- nsprüche, 1.) Magnifying glass with at least 12x, preferably 15x magnification with a 50 ° angle of view and a focal length of the object filled with glass, made up of four collecting members representing the image, characterized in that two of them contain cemented surfaces and one link with which the object fills the focal length Glass part is cemented. O · 2.) Magnifying glass according to claim 1, characterized in that the dem Object and .the eye-facing members are cemented and . Include two individual converging lenses. 3 ·) Magnifying glass according to claim 1 and 2, characterized in that -the Difference in the refractive indices in the cemented element on the object side is at least 0.10, preferably 0.15. and in the putty part of the eye at least 0.05 ». is preferably 0.07. 4.) Magnifying glass according to claim 1, characterized by the following data, the thicknesses and distances by _ lOfa of the focal length, the refractive powers of the surfaces by _ + 5% of the total refractive power, the • ~ "\ refractive indices around £ 0.03 and the Ny values around + _ 3 for the imaging, can deviate by Ψ 10 for the parts limited by flat surfaces: r _x = oo n _d / ny _d dj ^ = 2.5 (carrier glass of the image surface) r ₂ = oo I ₁ = 0.1 = 6.5 1.858 / 23.4 . d, = 34.1 (reflection prism) 1.850 / 32.2 = 1.2 1.858 / 23.4 r ~ = oo