| CPC G02B 3/14 (2013.01) [G02B 9/62 (2013.01); G02B 13/0045 (2013.01); G02B 13/0065 (2013.01); G02B 13/009 (2013.01)] | 17 Claims |
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1. An optical imaging system, comprising:
a plurality of fixed lenses disposed along an optical axis;
a first reflective member disposed on an object side of the plurality of lenses; and
a plurality of reflective members disposed on an image side of the plurality of lenses,
wherein at least one of the plurality of lenses is a variable lens having a variable focal length,
wherein each of the plurality of reflective members disposed on the image side of the plurality of lenses is configured to move as the focal length of the variable lens changes,
wherein −7<(fv_1×D6R_2)/(fv_2×D6R_1)<−1, where fv_1 is a first focal length of the variable lens, fv_2 is a second focal length of the variable lens, D6R_1 is a distance on an optical axis from a rearmost lens of the plurality of lenses to a reflective member most adjacent to the rearmost lens among the plurality of reflective members when the variable lens has the first focal length, and D6R_2 is a distance on an optical axis from the rearmost lens to the reflective member most adjacent to the rearmost lens when the variable lens has the second focal length,
wherein the plurality of lenses includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens disposed in order from the object side,
wherein the first to sixth lenses are spaced apart from each other along the optical axis,
wherein the optical imaging system has a total of six lenses, and
wherein the first lens has positive refractive power and a concave object-side surface in a paraxial region thereof.
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