Optical: systems and elements – Stereoscopic – Stereo-viewers
Reexamination Certificate
2002-03-15
2004-11-02
Chang, Audrey (Department: 2872)
Optical: systems and elements
Stereoscopic
Stereo-viewers
C359S462000, C359S469000, C040S743000, C040S707000, C040S739000
Reexamination Certificate
active
06813075
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a stereo slide viewer, and more specifically, relates to a stereo slide viewer in which the shape of a slide mount holder section has been improved, for better loading of the stereo slide mount and better positioning.
2. Description of the Related Art
The present applicant has filed an application for this type of stereo slide mount and stereo slide viewer (Japanese Patent Application No. Hei 11-273315), and this prior application will be first described with reference to
FIG. 4
to FIG.
9
.
In
FIG. 4
, reference symbol
1
denotes a stereo slide viewer, and this stereo slide viewer
1
is provided with a pair of left and right ocular lenses
3
L and
3
R at the rear of a slide mount holder section
2
of a channel shape, and provided with an illumination lamp
4
and a circular reflector
5
in front of the slide mount holder section
2
, so that by lighting the illumination lamp
4
, light is irradiated onto the backside of the slide mount holder section
2
by the circular reflector
5
. Ocular lens holders
6
L and
6
R for the left and right ocular lenses
3
L and
3
R have a construction capable of adjusting the distance between optical axes and focus in the direction of the optical axis.
A stereo slide mount
7
shown in
FIG. 5
is freely loadable into the slide mount holder section
2
. For positioning of the stereo slide mount
7
in the back and forth direction, a flat spring
8
is provided on the front wall surface
2
a
of the slide mount holder section
2
, and the stereo slide mount
7
is pressed against the rear wall surface
2
b
of the slide mount holder section
2
.
Moreover, a film pitch adjusting apparatus
9
is arranged in the middle of the left and right ocular lenses
3
L and
3
R, and outside of the visual field of the ocular lenses
3
L and
3
R. This film pitch adjusting apparatus
9
is for adjusting the interval between left and right film holders
11
L and
11
R of the stereo slide mount
7
loaded into the slide mount holder section
2
, by rotating helical cams
10
L and
10
R of the film pitch adjusting apparatus
9
. These helical cams
10
L and
10
R are formed substantially in a semicircular shape as seen from the side, and constructed such that in the initial position, the helical cams
10
L and
10
R do not come into the slide mount holder section
2
.
The film pitch adjusting operation and film mounting procedure will be described next. Two left and right film holders
11
L and
11
R are mounted on a base frame
12
of the stereo slide mount
7
, and the left and right film holders
11
L and
11
R are brought closest to each other, to thereby mount films
13
L and
13
R on the film holders
11
L and
11
R. The base frame
12
has left and right windows
14
L and
14
R, and the left and right film holders
11
L and
11
R have windows
15
L and
15
R, respectively, so that the light of the illumination lamp
4
reaches the films
13
L and
13
R.
Then, a collimation pattern mask
16
shown in
FIG. 6
is attached to the base frame
12
having the films
13
L and
13
R mounted thereon. The collimation pattern mask
16
is provided with a square window
17
so that the helical cams
10
L and
10
R can freely enter into and come out, as well as left and right transparent windows
18
L and
18
R. The same collimation pattern CP mainly composed of a plurality of vertical lines is respectively printed on the backside of the transparent windows
18
L and
18
R.
Subsequently, the base frame
12
attached with the collimation pattern mask
16
is loaded into the slide mount holder section
2
of the stereo slide viewer
1
shown in FIG.
4
.
Then, sense of intimacy of images in the films
13
L and
13
R with respect to the collimation pattern CP of the collimation pattern mask
16
is observed, in a stereoscopic vision through the ocular lenses
3
L and
3
R of the stereo slide viewer
1
. If the stereoscopic images are seen in the same plane as the collimation patterns CP or beyond the collimation patterns CP, the film pitch of the stereo slide mount
7
is appropriate, and adjustment of the film pitch is not necessary.
If the film pitch is not appropriate, a knob
19
of the stereo slide viewer
1
is rotated to adjust the film pitch. That is to say, if the knob
19
is rotated in the clockwise direction, the helical cams
10
L and
10
R rotate from the initial position to enter into the slide mount holder section
2
, so that the points of the cam surfaces
10
a
L and
10
a
R enter into the two film holders
11
L and
11
R to push the film holders
11
L and
11
R outwards. As a result, the interval between the film holders
11
L and
11
R increases.
At this time, the area where the outside edges of the screen of the films
13
L and
13
R are masked by the edges of the transparent windows
18
L and
18
R of the collimation pattern mask
16
increases, and the distance of the stereoscopic image moves backwards with respect to the collimation patterns CP. Then, at the time when the stereoscopic image is seen in the same plane as the collimation patterns CP or beyond the collimation patterns CP, it is the optimum film pitch. At this time, the knob
19
is reversely rotated to thereby return the helical cams
11
L and
10
R to the initial position. During this time, the film holders
11
L and
11
R are held in the optimum film pitch position.
Subsequently, the stereo slide mount
7
is taken out from the slide mount holder section
2
, to remove the collimation pattern mask
16
from the base frame
12
, and instead thereof, a cover frame
21
comprising two windows
20
L and
20
R shown in
FIG. 7
is loaded. As a result, the stereo slide mount
7
having the optimum film pitch is completed.
The completed stereo slide mount
7
can be loaded into the slide mount holder section
2
of the stereo slide viewer
1
and used for appreciating the films. Even if the knob
19
is rotated at the time of appreciation, since the film holders
11
L and
11
R are covered with the cover frame
21
, the helical cams
10
L and
10
R are not brought into contact with the film holders
11
L and
11
R, and hence the film pitch does not change.
Moreover, at the time of adjusting the film pitch, in the case where the film pitch exceeds the optimum pitch and become excessive, and hence the stereoscopic image is seen far away from the collimation patterns CP, CP the film pitch is readjusted. At this time, the knob
19
is reversely rotated to return the helical cams
10
L and
10
R to the initial position. The stereo slide mount
7
is taken out from the slide mount holder section
2
, and the left and right film holders
11
L and
11
R are made to slide to the position where the film holders
11
L and
11
R are in the closest position. Then, the stereo slide mount
7
is reloaded, so as to readjust the film pitch by rotating the knob
26
.
The stereo slide viewer
1
is a stereo slide viewer equipped with the film pitch adjusting apparatus
9
, but other than the stereo slide viewer
1
, a relatively cheap stereo slide viewer (not shown) used mainly for appreciation, without having the film pitch adjusting apparatus, is also widely known.
FIG.
8
(
a
) shows the stereo slide mount
7
, which can be loaded into either a stereo slide viewer
1
having the film pitch adjusting apparatus
9
, or a stereo slide viewer not having the film pitch adjusting apparatus and used mainly for appreciation. In more detail, the left and right opposite ends are formed in a circular arc. If the vertical dimension of the stereo slide mount
7
is designated as H, the lateral minimum dimension is designated as Wa, the lateral maximum dimension is designated as wd, and the radius of the circular arc of the left and right opposite ends is designated as r, then, the stereo slide mount
7
is formed in such a relation that:
Wd
={(
Wa
)
2
+(
H
)
2
}
1/2
r
=[{(
Wa
)
2
+(
H
)
2
}
1/2
/2.
On the other hand, FIG.
8
(
b
) shows another rectangular stereo slide m
Chang Audrey
Fattibene Arthur T.
Fattibene Paul A.
Fattibene & Fattibene
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