Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
An optical rearview device, which is installed in a rear part of a vehicle, comprising a light emitting source and a lens set mounted in front of said light emitting source, said light emitting source emitting a high intensity incident ray when said vehicle is backing, said lens set comprising a projecting lens having at least a light incident plane positioned in a predetermined incident angle with said incident ray emitted from said light emitting source, wherein a portion of said incident ray penetrating said projecting lens and being refracted to form a refracted beam which is parallel to said incident ray, another portion of said incident ray being reflected off said incident plane of said projecting lens to form a reflected beam, whereby at least two light spots are formed correspondingly on an object behind said vehicle when said refracted and reflected beams projected from said projecting lens are cast onto said object when said vehicle is backing, a distance between said object and said vehicle being able to be judged and determined.
Claim 2
Dependent Claim
174 words
An optical rearview device, which is installed in a rear part of a vehicle, comprising a light emitting source and a lens set mounted in front of said light emitting source, said light emitting source emitting a high intensity incident ray when said vehicle is backing, said lens set comprising a projecting lens having at least a light incident plane positioned in a predetermined incident angle with said incident ray emitted from said light emitting source, wherein a portion of said incident ray penetrating said projecting lens and being refracted to form a refracted beam which is parallel to said incident ray, another portion of said incident ray being reflected off said incident plane of said projecting lens to form a reflected beam, whereby at least two light spots are formed correspondingly on an object behind said vehicle when said refracted and reflected beams projected from said projecting lens are cast onto said object when said vehicle is backing, a distance between said object and said vehicle being able to be judged and determined.
Claim 3
Dependent Claim
74 words
An optical rearview device as recited in claim 1 further comprising a mounting seat for holding said lens set in front of said light emitting source, said mounting seat comprising a holding ring clamped on an emitting end of said light emitting source, a holder provided on one edge of said holding ring for firmly holding said projecting lens in a slant position by engaging one end of said projecting lens with said holder.
Claim 4
Dependent Claim
37 words
An optical rearview device as recited in claim 1 wherein said incident angle between said light incident plane of said projecting lens and said incident ray emitted from said light emitting source is less than 22.5 degree.
Claim 5
Dependent Claim
21 words
An optical rearview device as recited in claim 1 wherein said projecting lens is a rectangular lens with a predetermined thickness.
Claim 6
Dependent Claim
122 words
An optical rearview device as recited in claim 1 wherein said lens set further comprises a reflector mounted adjacent to said projecting lens, said reflector being positioned along a path of said reflected beam and having a predetermined angle with said reflected beam, said reflected beam reflected off from said projecting lens being further reflected off said reflector to form a secondary reflected beam which crosses a path of said refracted beam, so that when said refracted beam and said secondary reflected beam are cast onto said object behind said vehicle, two light spots are formed correspondingly on said object, whereby when said two light spots are overlapped at one point, said vehicle is very close to said object behind said vehicle.