APPARATUS AND METHOD FOR PANORAMIC VIDEO IMAGING WITH MOBILE COMPUTING DEVICES
An apparatus includes a housing, a concave panoramic reflector, a support structure configured to hold the concave panoramic reflector in a fixed position with respect to the housing, and a mounting device for positioning the housing in a fixed orientation with respect to a computing device such that light reflected by the concave panoramic reflector is directed to a light sensor in the computing device.
1 . An apparatus comprising:
a housing;
a concave panoramic reflector;
a support structure configured to hold the concave panoramic reflector in a fixed position with respect to the housing; and
a mounting device for positioning the housing in a fixed orientation with respect to a computing device such that light reflected by the concave panoramic reflector is directed to a light sensor in the computing device.
2 . The apparatus of claim 1 , wherein a portion of the concave panoramic reflector is positioned outside of the housing and displaced from an end of the housing in an axial direction to form an opening between an edge of the concave panoramic reflector and the end of the housing.
3 . The apparatus of claim 2 , wherein the shape of the concave panoramic reflector defines a vertical field of view.
4 . The apparatus of claim 1 , further comprising:
a mirror positioned to reflect light from the concave panoramic reflector to the light sensor, wherein the mirror is sized to encompass a field of view of a camera in the computing device.
5 . The apparatus of claim 1 , wherein at least a portion of the housing has a substantially frustoconical shape.
6 . The apparatus of claim 1 , wherein the support structure comprises:
a transparent member positioned in the housing in a plane perpendicular to an axis of the housing; and
a central opening configured to accept a post coupled to the concave panoramic reflector.
7 . The apparatus of claim 1 , wherein the mounting device comprises:
a case for the mobile computing device, wherein the case is configured to couple to the housing.
8 . The apparatus of claim 7 , wherein the case includes an oblong opening configured to make an interference fit with a substantially oblong protrusion on the housing.
9 . The apparatus of claim 7 , wherein the case includes a keyed opening configured to receive a keyed protrusion on the housing.
10 . The apparatus of claim 7 , wherein the case includes a bayonet opening configured to receive a protrusion on the housing.
11 . The apparatus of claim 7 , wherein the case includes a magnet configured to couple to a magnet on the housing.
12 . The apparatus of claim 7 , wherein the case includes an alignment well configured to receive an alignment bump on the housing.
13 . The apparatus of claim 7 , wherein the case includes an opening configured to receive a winged protrusion on the housing.
14 . The apparatus of claim 7 , wherein the case includes a plurality of openings configured to receive pins on the housing.
15 . The apparatus of claim 7 , wherein the case includes a lip configured to grip the bevel along an outside edge of a screen on the mobile computing device.
16 . The apparatus of claim 15 , wherein the lip holds a back face of the case in tension against a back of the mobile computing device.
17 . The apparatus of claim 7 , wherein the case includes two parts that slide onto the mobile computing device.
18 . The apparatus of claim 17 , wherein the two parts are joined by a pair of parallel, angled surfaces, forming an interference fit when the two parts are slid onto the mobile computing device and then pressed together.
19 . The apparatus of claim 7 , the case includes an opening configured to receive a protrusion on the housing and allowing the protrusion to slide into a position adjacent to a camera opening.
20 . The apparatus of claim 1 , wherein the concave panoramic reflector has a shape defined by one of the following equations:
r
(
θ
+
A
α
)
=
r
cot
(
k
tan
(
θ
+
A
α
)
+
π
2
-
k
tan
(
R
cs
)
-
R
cs
2
)
;
r
(
θ
+
A
α
)
=
r
cot
(
k
tan
(
θ
+
A
α
)
+
π
2
)
;
or
r
θ
=
r
cot
(
k
tan
(
θ
)
+
π
-
A
2
-
k
tan
(
R
cs
)
-
R
cs
2
)
wherein, A is the angle between the direction of a ray r o and a line parallel to the camera axis 294 in radians; R cs is the angle between the camera axis and a point on the mirror that reflects ray r o in radians; R ce the angle between the camera axis and an edge of the mirror in radians; r o is the inner radius in millimeters; α is the gain factor; θ is the angle between the camera axis and the reflected ray r in radians; and k is defined in terms of α in the first equation.