RU26664U1 - LIGHT LIGHT - Google Patents

Abstract

A fast lens containing four components, the first of which is the positive meniscus facing concavity to the image, the second is the negative meniscus facing concavity to the object, the third and fourth menisci are convex to the subject, characterized in that the second concave surface of the first meniscus is aspherical and we have the relations | R | <| R |, d≤0.01R, where R is the radius of the fifth optical surface; R is the radius of the sixth optical surface; d is the thickness of the third component.

Description

IIJ is a fast-moving facility (GB 1478115 A dated 06/29/1977,

p. 8), I work 5day in the wavelength range from 8 to 14 microns and containing

Four component: -

-positive meniscus, facing concavity to the image,

-negative meniscus facing concavity to the subject,

-2 positive meniscus, convex to the object. The total thickness of the lenses of this lens is at least (where f is the distance of the lens). When using optical material operating in the infrared range of wavelengths, for example, v if

expensive silicon or germanium, the large total thickness of the LSH significantly increases the cost of construction.

The third lens in the specified lens has 6 olp) then the thickness (about 18 mm), while, that is, the lens should be; repulsive. In fact, due to the large thickness, this lens is

.TA IikStW. -. k..t.i.tf.f

-,:;: -.-: 4 - - - fSlStrl..fsSiSte -. "LySU-ii:.; ... .-- 1№ -" - -S-. i - ..V4iiiu.-i - -.tw -.--, l.: t-;

... i it: -t; i ---; b.,: lilu:; i; M .SS:

. . . -

:,

 ; -: fl l-: i-.

:; JTirSfcV

 Hf "it ..--

; -:.: ca. using a classic lens

radii IR5 IR6 | due to the introduction of aspherics on its second surface: J; | The task of the invention is to create a fast ::: lens with high image quality with a relative aperture of -; 1 :;

not less than 1: 2, field of view of not less than 2w 16 deg, and rzuote on the cheek;

-; .- .; to. ASiffiUi i

range from 8 to 12.5 MKM., :: :: SStj

The technical result is a simplification of the design of the lens due to jj-:; 35 reduction of the SUMMARY LENS THICKNESS. J; Lvlrt J ШШ1

This is achieved by creating a fast lens containing; §; T

four components, the first of which is the positive meniscus, - - -iiSaltJ;

facing concavity to the image, the second - from the positive direction || j turned concavity to the predalet, the third and fourth menisci g: convex to the object, in contrast to the known object, in the object - Ш1

the second concave surface of the first meniscus is made aspherically | ;; U; j u

There are relations;

1 R5 I I Kb I,

  0.01 R5, -::: Eir; ip

where: R5 is the radius of the fifth optical surface,: I HSC ;;; Ziluk

Rj6 - radius of the pestled optical surface, ilSui

IJl,., ......, .z.-..-. ,,. / ,. .:. .

d3 is the thickness of the third component. IV

In FIG. 1 presents an optical diagram of a prehep lens, on:

Figs 2 and 3 are graphs of aberrations of the calculated variant of the fast aperture fe -: -itSiri, -.- a. ; . .if: tSA-JiSfHr., .-- objective at a focal length of 62 mm. ; | j; ; | | | -:; ||| 1sh

---. : ";. .- .-. r - 4iS wiU -, The lens (Fig. 1) consists of four sequentially installed; ,: ONE-ONE LENSES: positive meniscus 1, facing concavity ;; ;

 -. - g .- g- - ..- f itiaifft

,,,; :::. ;:. 4". . .iSiU.;,:,.

- .-: -iri.-.-. .. .T / JsKiir -i-f

  - -: S r-gf- .iJ tiU-lU.ii

: .-.;: 5- ;; y 5E: - i i

:: .- i-Ujjqc.-; -1 - .i (B ..- ii; i

.. (ati-3r-.7i .. "- jiiKU -; -.- 1

    -a | §1T -, -: i - - iif-. -, -i «« liittti4

i -.Р :: .tiajs llittf

- .M.-i.

f. .fct-; : ..---. ii. , .. / ifeiii; .-- V i; it; - f. , “7isy..t4- i.-.---. -; SE -.- r. fTS4tSi.t.-V.

I .T r li 5 fc; i:

; -, - i --- -; f-: i; - c- r., - ... 4f XiwbkirJr.s .- "(| i"; -; sg Wpb-t yi-h-no. fr "4t U - .: 4V. ssSipii-:: -.- i.ch.:; -;: it ;.. r.-e ..; i - -. .---: -:; - t; -af v ...- .. Г Nge5: t: S : -fc - 4i; No.-tir.tsttfci-i.-J .- ;. (l;. 45-i J -fefr- ih.. WK tilrr f it was possible to reduce the thickness of the third S%. in ": she - - g V -, .- | positive meniscus with cooTHoimapra: 3iteuivi LeM refraction of at least 4, for example, from Germany gave work in YSH1 SHTsShSh

Tral range from 8 to 14 shsm. In the lens, the second (concave) over the tSlI

The lens 1 is aspheric. Aperture diaphragm matches cJ / iSi

- - -:;: :: f: -к .-:; -; / -: - ,, .-- ff iii-jV

first surface of lycra 3. libieioT place corresponding

1R51 I R6,; :

d3 0.01R5, I

The lens works as follows. Luminous flux from hgredmfga;

located at infinity, falls into the lens, where the passage through G 1

: - - and .-. (: 5 4i tft.-Tfer - .-.%: Ti-i.vi-ЛННЗЫ 1,2, 3,4 and forms the image of an object in the plane of the best: - g | p | r

installation in which the optical image receiver is installed (not :; |: || |: ;; ::

gglt-tatsg - Ts-zgllPOKEZAN.;. --- -J-iVliS r -W Sitfl,;. In accordance with the proposed solution, the fastest

..; ;, - -slir;: - - .f 3it; vK

lens giving a far infrared range from 8 to 12.5 microns with a design J

parameters listed in the table.v:;:; I; J :, Complied with the following: (K4 242.126 mm .759 mm, t: -i

d5 2.4 MM 0.01 R5 0.01x242.126 2.42 MM,;;;: G: 3G-3 | Y ::

Characteristics of the calculated lens ;; I lSt

focal length62mm: - ;: No. .- V :: i-l,% .i: .i :.

relative aperture1: 2:

Angle of View 16 degrees .; iSKSrSuv ::

back focal length 52.78mm -if-: 3 | r S | iaT

The total amount of lenses in the lens is:

Zd dl + J3 + d5 + d7 7.5 + 54-2.4 + 2.4 17.3MM 0.28f. : r

The lens has for the wavelength I 9 μm the following aberrations: S W | J

transverse spherical aberrachsch for a point on an axis no more.

transverse ferroschal pshchrogo inclined beam vanity field zren: kya 2w

t .. ii bj i5.) Sj4i -. viryjiiSi Si-it-r. (% ti-, i: M - .t iSfetb nLJ i,: vs5FTr

- iwtUw -.-. i

"SsSitW ---;

-. H- T-: C 5) fJ-: {"stiHics..li. : -4 -. KK - iAia ff. "LiSiUib - i; „I. j-. , f: ss.-ssi-ia fej-i

S s I K-,; 5- lШ-f i -ll iчi Ri; SS ifcrt; 4Sjfe; t -... jfcs fituafa

- -. -- -5. ; - fcf ;; -.- ife-f. - “-.“ IS-t.

Mi% M. "F ff-.-Ugg E; :

I Y: K - fy-f- eilw:; - r,, V -r --- 7, ..: .. II J. l: 3% -T vr --r-.-l.bn Li- ::.

-;:; - lil-- tu.-.: v. .

;,; .,; iietti;); - v fr 5-: va 4: V; 4i | gti; b rl-: q;;;;.; , viS; i vi J .-- itfjiiwU-i i

f tiV S: - 4s f ---- - 5 l1% b: i;. .

i: ivicifc o - s4iiSt; k-

,: - ..:, -. i: f -ivas - ,. -. - 5 I; - KY .UJ | iui «,: -;:; J: - .. v ;, - s l4sU-t "1 ..:. 1 -, -. - /:. fl Sb bjri: -

 . ., r - ;: J; ; Qi; - ;. - :,

, i- V SI. ... ;; -i;: -: Sf-bv:. (

 .-.- .-- -h f ..- - i ---; .W sSpaWiti-i--; -.: L. .f A -.- Sifef: .i; -f -.-- V.; -: -S: -i -. iyitsfe, ;; : t-r

. - :: -. iiJi. .. "SitiiUivtf

--.- -. -;:; - ± -i - isi -.f S-t3-i-. --- .- --i ;; .- .. -tviljb: -: with l-f -Stf- -ff .-, -: ..li ..,., -.

it G. ..rtrlSi; -i: s: ix- :; -J. .WJ, 5 i; li- “: ..: - hL - Hi: - .. -;

 -: -5g - L b- "K; - - .U-i. , 494 The equation of the asphic surface y + Thus, as a result of the proposal, we obtain the technical result: created by a 1: 2 osnoshnelnym hole visual field for work In the spectral day: - ..- r- jiatbirj-vi. -: j # t; -; 5; ii :: t:; - ;; "-. . .i.rtEHii y.i v- -., z b19.24x + 1.525x O: i-- --lch-. .A- i t-i-i-i; V-. : .-- w -iiiiiLiJi-r. "j.sSJbilLt.i-i. :1. -, f-.i, V S-V - Г х х; 1д: в ---. . .-: k - of the solution rb special -jsfe- -: "vfifKii; a --.-.- JCSs: .-, -, vi iK-li-ii, JV J - aperture lens with |: .J : 111B, -. S;::..; -. „1y1Shch. hail, with high cachem. .... 1-.: G .-: "p;, -; : i .-. yy1yL -: .- - i W: -: .. i i «fli; r. ; tazone from 8 to 12, bmkm11rn -, ui.-UE.- i- I. .4 - stS (ti:; .- r: -; iiS t .; i -

fill, .- i - t:: “y.-.- f

with the ratio of the radii IRS | R6 due to the introduction of aspherical on | ;:

.-v; -H: i-, -l - / -; -;

second surface of the lens. Asfernka did not complicate the design, because; |: | similar aspherical surfaces are produced in series by the g- method.

. -: -. - i; iv dag, -

vacuum deposition of a germanium layer on a germanium substrate. 1 Srome: Щ

- -: i:. :, -,:

TOGO, as you know, the use of aspherical surfaces leads |: g 5 to simplify the design, see, for example, D.S. Volosov Photographes j: opgika, Izd.Iststvo, Moscow, 1971, pp. Bzb .: t

Head of the Pasekgovashy Sector

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A- i- i; iv; pif - r: "; a .rifi

 I, - f :: &, .. 4. . t: TJi. .- 9y-- 4i .- ;;: 4t -----

c: - .. asfes J

: -.-: - is-iSi: -

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rb-w; | -5J 1% - and “the city of CHELEUPCHIAT.M,

Claims (1)

A fast lens containing four components, the first of which is the positive meniscus facing concavity to the image, the second is the negative meniscus facing concavity to the object, the third and fourth menisci are convex to the subject, characterized in that the second concave surface of the first meniscus is aspherical and there are relations
| R ₅ | <| R ₆ |,
d ₃ ≤0.01R ₅ ,
where R ₅ is the radius of the fifth optical surface;
R ₆ is the radius of the sixth optical surface;
d ₃ is the thickness of the third component.