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Патент USA US2087329

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July 20, 1937..
Patenteeì 51123,! 2%, 1937
Harvey N. Ott, Bu?alo, N. Y., assignor te
Speneer Lens Company, Bu?’alo, N. Y.
Ùrìginaî appìication November 16, 1935, Serial
N0- 50,165- Divìàed and this applieation June
25, 193.5, Serial NO. 87,189
2 Cìa-ims.
This ìnventìon relates to ìmprovements in bi
nocular mìcrosoopes of the kìnd havìng the
optical axes of a paìr of objectìves arranged ai;
Fig. 5 ìs a perspectìve view of a, mounting for
the prisms of Fig. ‘1;
different angles from those of the optîcal axes
Fig. 6 is a diegrammatìc representation of the
prisms showìng the passage of a 1ìght ray there
of the eye pieces or oculars.
In such a microsoope ìt 1's desìrable to have
the axes of the oculars converge ai; substantially
the normal angle of convergence of the human
eyes, which ìs usually about eight degrees, so
10 that a person using the mìcroscope oan remove
hìs gaze from the instrument for readìng or
making notes, end return to the microscope Wìth
out requìrìng readjustment of the eyes.
On the other band, ‘che angle between the paìr
of objectîves should preferably be somewhat
greater than the angle between the oculars, say
sixteen degrees, since by so disposìng the ob
jectives greater perspectîve and stereoscopic ef
fect results.
Th1's applìcatìon 15 a division of my copendìng
application for Letters Patent, Serial No. 50,165,
?led November 16, 1935 for Improvements in
'I‘he optical system of the instrument, as shown
in Fig. 1, incìudes one or more sets of paìred ob
jectives, one pair 28 of whìch ìs ìllustrated in
Fig. 1, end a pair of oculars or eyepiece tubes 21.
Dìsposed between each cbjeotive 25 and one of 10
the oculars 21 îs one of my improved re?ecting
systems 22 so posîtìonecî thet image rays passing
upwarrîly through an objective 23 are diverted
by the assooiated re?ecting system
end re
.?ected to the companìon ooular 21 at an angle 15
di?erent to that of the image rays al: ‘che ob
jectîve. The re?ecting systems 22 2.150 erect the
Each re?ecting system 22 is mounted in a hous
ìng 25 which includes a base 2% end a cap or
cover portìon 2?. The prìsm housìngs 25 are
substantialîy of cylindrical Îorm and the base 26
of each housîng ìs rotatably connected to the top
An object of this inventìon ìs to provide a. bi
nocular rnìcroseope Wìth novel, improved. and
of a body member or support 15 by a hollow swivel
sìmpìi?ed re?ecting means, in the nature of a
prìsm system for changìng the angle of the image
rays' from one anglo at the paìred objectives to
a different angle at the oculars, and for erectìng
30 the image.
Another object of the ìnventìon is to provide
a. novel prìsm system of thîs sort, one for each
eyepìece Whìch ìs composed of îhe minimum
nuînber of par‘bs end ìs relìable and dependable
(01. 38-39)
in use.
Various other objec‘às end advantages of the
ìnvention will be apparent from the followìng
descript-ìon of an ernbodiment thereof and the
nove1 features of the invention Wìì1 be pointed
40 out in connectìon wìth the appended claims.
Fig. 1 is‘ a face vìew, partly in section, of a
portion of a bìnocuîar microscope in which the
features of my inventìon are embodied;
Fig. 2 1's a plan vîew, partly in sectìon, of one
of the re?ectìng sys'rems of the ìnstrument,
mounted in its housìng;
Fig. 3 is a s?de elevation thereof, taken in the
dìrec’cion of the arrows, Fig. 2;
Fig. 4 îs a perspective view of two prîsms
foimìng one of the refìeotìng means of the in
connectìon 28 which îs concentrîc wìth the axis
of the? related objective 25, see F‘ìgs, 1 and 2.
Eaoh eyepîece tube or ocular 21 ìs mounted ec
centrically of the swiveî connectìon of its sup
porting housing 25 upon the top WBÀI of the hous
ing and, by rotatîng the housings 25 abou‘b theîr 30
swìvel oonnection 28, the oculars 21 may be
moved towards and from eaoh other so that they
may be adjusted to suit the pupillary distances
of the eyes of different users or‘ the ìnstrumen’s.
As shown, each objectìve
is mounted in the
lower portìon of the body member 15, in aline
ment with the hollow swìvel connectîon 28 of the
related ooular mountìng. The details ci” ‘che
mountìng in Whìch the objectives are supported
are fully discîosed in my saìd pendîng applica
tìon Serial No. 50,165, to whìch reference may
be had for a more full dìsclosure.
Hoxvever, in orcìer to produce the desired stere
oscopîc e?ect, the axes of the two objectives 26
may be arranged et a suìtable angìe, for example,
about 16° apart.
On the other band the tWo oeulars 2! are each
dìsposed so that the angle between them ìs con
sìderably less than 16°, say approxîmately 8°,
from one 01° the objectîves to its assooìated
whereby ‘che user of the instrument san vîew ob
jects through the inst‘rument et‘ a more conven
ìent or comfort‘able angle, thaî, is, an anglo whîch
ìs approximately that of nìs eyes when making
notes or observations adjacent the ìnstrument,
strument, detach°d from their mountings, anzi
illustrating the paîh of lìg’nt rays therethrough
the oculars, at the same time being slightly in
olìned. toward. the user.
Each of the re?eoting means or systems 22,
before mentìoned, ìnoludes two re?ectìng unìts
or structures, each havìng a pair 0Î opposed, an
gularly related re?ectîng surfaces dìsposed so that
imago rays passìng up=warclly through an objec
tìve 25 are ìntereeptecl by a re?ecting surface of
one of said unìts and are dîverted therefrom to
10 the other surfaoe of that unìt in a path lateral
to the axis of that objectìve, and are then in turn
diver'oed baok along a path towards the ob-jectìve
to one of the re?ecting faees of the other unit,
from which the rays are, in turn, re?ected. to the
As W'Ìl]. be seen from an examinatîon of Figs, 1
and 2, the top fase 95 of the part H6 of the body
ìs divided into two portions which are slìghtly
ìnclìned in opposite direcî;ions from front to rear
o-f the ìnstrument from a line passìng through
the axìs art and these inolìned_ fase planes are
normal or at right angles to the axes of the
objeotîves, and the base 25 of the ho-usìngs 25
are in parallel relation to these faoes. The prism
systems 22 in said housings 25 are rigidly mount
ed so as to turn Wlth the housings, and‘ slnoe, as
before stated, the swivel conneotîons 28 are con
centrìc Wìth the axes of the objectìves, the anglo
at which the image rays leave the re?ectìng sys
tems and pass into the ooulars Will remain the
vertecl upwardly by that face through the asso
same W'lth reference to the axìs of the objectives
ciated ocular 29 but at a different angle to the in any posîtion to whioh the housings and ocu
pa’ch of the rays through the objectìve, and. dur
lars are turned for adjusting the pupìllary dis
ìng the passage of the rays through the reflectîng tance between the oculars.
20 means or system 22,1;he ìmage is ereoted.
However, in the movement of the oculars to 20
In the construotìon illustrated, the re?eotìng wards and from one another in their adjust
unìts of each re?ecting system 22 o‘omprìses a ments to di?’erent pupìllary dìstances the angle
paìr of glass prìsms 15 and 'l‘à rigiclly mountecly between the axes of the oculars Wîll change
upon the base 26 of the housing for the system. slightly. The maximum change in use, however,
ìs relatìvely small, say from an angle of about 25
25 The prism ‘E5 has tvvo reflecting faces ‘H and '53
15 other face of that unît.
The rays are then di
whìch are arrangecl so that the angle between
them (Whìch ìs preferably 90°) faces towarcls the
objeotìve With whîch il; ìs associate'd anol is so
dìsposed that the face ‘l’? thereof extends oblique
30 1y at any angle of 45° across the axis of that
objective, whìle the other re?ectlng face 78 ìs
disposed laterally of said axis. The other prism
‘7° to an angle of about 9° or 10°.
This varìatìon ìs of advantage in that a per
son havîng a relatively narrow pupillary dìstance
Will normally see things at close range through
a narrower stereoscopic angle-than a person hav 30
ing a wìder pupillary diesis-ance, and vice versa.
The re?ecting means or prism system 22 can
or unìt ‘55 is also formed. Wìth two opposecì re
flecting surfaoes ‘l'8 and 88 so that the angle be
be rigidly mounted in the housings 25 in any
‘suitable way. As shown in the drawing, see
tween them faces upvvardly towards the associat
Figs. 1, 2 and 5, I provide the base 25 of each
e‘d ocular 25 Wìth the fase 80 extending ob
housìng With an upstanding, hollow boss or sleeve
lîquely across the axìs of that ocular. The prìsms 96 whìoh is apertured concentrically Wìth the
or units 715 and ‘E6 are completed by faces 82
swîvel connection for that housing, and this boss
and 83 extendìng across the angles of the prisms. terminates in a ?at face across which an end of
The tvvo prìsms of eaoh system are dìsposed cross
the prìsm 15 extends so as to posìtion the re?ect 40
wìse of and at rìght angles to each other Wlth ing fase T1 thereof to întercept the rays from the
approxìmately half of the face 82 of the prìsm assocìated objectîve. This prism 15 is rigidly
‘E5 extending parallel W'lth and preferably en
secured in thìs posîtîon between a ?xed or inte
gagìng upon approxìmately half of the fase 83 gral plate 98 extending upwardly from the boss
of the prìsm 'ri5 as shown clearly in Fig. 4. The 96, and a clampîng bar 99 Which is secured to the 45
other portîon of the face 83 is out away al: a. plate 98 by sorews lilli. The other prism 76 ìs
slìgh‘b angle or taper as shovvn in Fìgs. 3 and 6
secureol between a ?at fase l02 on the boss 96
so that thîs portion, which faces the ooular 2l, and a clamping bar E53 as by screws HM.‘ The
swivel connectìon between each housîng and the
Will be normal to the axis of that ocular to there
by avoid distortion of the image by refraction. part H5 of the body may be constructed by the 50
By this arrangement ìt Will be seen upon refer
provisìon of a downwardly extending annular
ence to Fig. 4 that a ray of light passing up
shouloler l58 formed on the bottom or base 26 of
wardly from the objective ?rst- ìmpinges upon
the oblique fase Il! of the prìsm 'L’5, is diverted
transversely thereby to the opposeol face '58 which
in turn refleots the ray downwardly through the
abuttìng portions of the faces 82 and 83 of the
tWo prìsms. The ray continues through those
faces to ‘the oblique fase î9 of the prìsm '15‘, is
the prìsm housing and which rotatably ?ts in a
60 clîverted thereby in a lateral directìon (but at
righi: angles to the dìrectìon in which ìt was
?rst slirectecl laterally by the face TE) until it
ìs ìntercepted by the last oblique fase 85 of the
prism ‘E6. " I-îere it ìs re?ected. upwardly through
the ocular.
In order to change the anglo between the rays
passing through a. paìr of objeotìves which, as
above stated, may be approxìmately 16° to a dif
fel‘ent anglo, say an anglo 01° approxîmately 8°
70 between the ooulars I Îorm one cf the prisms,
of eaoh re?ee 'ng system, for example, the prìsm
'55 so that the anglo between the re?ecting faoes
thereof is greater than a rìght angle, far exarn
ple, 93°, while the corresponcling anglo of‘ the
35 prism 15 is 90°.
hole extendîng through the top wall of said. part
15. A ring or retaining member l 50 abuttìng 55
the bottom face of the shouloler 108 and the adja
cent bottom face of the wall of saìd arm part l6
and suîtably secured, acts to retaìn the housing in
rotatable connected relation to the part H6.
I claim as my înventìon:
1. In a microscope having an objective, an ocu
lar which has îts axis at one side of and at
approximately an anglo of 4° to said objective,
re?ecting means interposed between said. objec
tive and said ocular comprising a prism having a 65
pair of opposed, inclined reflecting surfaces with
an anglo between thèm of 90", one of said sur
faces being dìsposed to receive imago rays from
saîd objective and reflect the same to the other
surface of saìd prìsm, and a second prism having 70
a pair of re?ecting surfaces With an angle between
them of 93°, one of saìd surfaces beìng dìsposed to
receive the image rays from the second surface
of said ?rst prism and re?ect them to the second
surface of saìcl second prìsm, said. second surface 75
of saìd second prìsm being dìsposed to re?ect said.
rays ìnto said. ocular, and one of saìd prisms beìng
arranged in a direction transverse of the other
prism, whereby an image is erected in the pas
sage of said rays through saìd re?ecting means,
and is re?e‘cted into the ocular along the axìs
thereof by reason of the 93° angle between the
re?ecting surfaces of said second prîsm.
2. A binocular microscope havìng a set of
paired objectîves havìng theîr axes at an angle
10 of approxîmately 16°, two oculars arranged wìth
their axes at approximately 8° and each of whîch
receives ìmage rays from one of said objectìves
and has its axìs dìsposec'l at an angle of approxì
mately 4° to that of the corresponding objectìve,
15 an image erectìng re?ectìng system interposed
between each of saìd objectives and its ocular
and comprising a. prìsm havîng a. pair of opposed,
inc1ìned re?ecting surfaces disposed. sia an angle
of 90°, one surface of said prìsm being dìsposed
obliquely upon the axis of said objective to re?ect
ìmage rays therefrom to the other surface of said
prism, and a -second prism havìng a pair 0Î re
?ecting surfaces disposed at an angle of 93° and
arranged crosswìse of saìd ?rst prìsm and having
one of its re?ecting surfaces positioned. oblìquely
upon the axìs of saìd ocular, and the other sur
face of saìd second prìsm beìng posìtìoned. to 10
receìve the image rays from the second surface
of said ?rst prìsm and re?ect them to the ?rst
mentioned surface of saìd second prism, whereby
that surface of saìd second prìsm which crosses
the axis of saìd ocular Will re?ect ìmage rays înto 15
said ocular along the axis thereof.
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