# US 5,706,140 A · Optical distance measuring equipment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,706,140 A - Document ID: US5706140A - Status: Granted - Kind: A - Application number: 08/297,543 - Filed: 1994-08-31 - Granted: 1998-01-06 - Earliest claimed: 1993-09-06 - Assignees: Kansei Corporation; Kabushiki Kaisha Koden Seisakusho - Inventors: Jun Nishino; Hiroshi Takeda; Sigeru Ryugo; Hidefumi Ito; Takashi Yoshimura - Web page: https://patentgrep.com/patent/US5706140A ## CPC - G01S 7/4811: {common to transmitter and receiver} - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract An optical distance measuring equipment in which light from a light emission element is transmitted to an object through a light transmission lens, and light reflected on the object is received by a light reception element through a light reception lens so that a distance to the object is measured on the basis of light transmitting timing and light receiving timing. In the optical distance measuring equipment, a lens holding member for disposing the light transmission lens and the light reception lens substantially at the same distance relative to the light emission element and the light reception element respectively is provided in front of a light transmission/reception board on which the light emission element and the light reception element are installed. ## Claims ### Claim 1 A light transmission lens of a laser head in which a substantially semi-spherical plane convex lens capable of compressing a light beam in both a longitudinal and a transverse direction and a plane convex cylindrical lens capable of compressing said light beam in only one of said longitudinal and transverse directions are integrally formed by injection molding by use of light transmissive resin as material in a manner so that respective flat surfaces of said plane convex lens and said plane convex cylindrical lens are made common to each other. ### Claim 2 A light transmission lens of a laser head in which a substantially semi-spherical plane convex lens capable of compressing a light beam in both a longitudinal and a transverse direction and a plane concave cylindrical lens capable of compressing said light beam in only one of said longitudinal and transverse directions are integrally formed by injection molding by use of light transmissive resin as material in a manner so that respective flat surfaces of said plane convex lens and said plane concave cylindrical lens are made common to each other. ### Claim 3 A light transmission lens of a laser head in which a substantially semi-spherical plane convex lens capable of compressing a light beam in both a longitudinal and a transverse direction and a plane concave cylindrical lens capable of compressing said light beam in only one of said longitudinal and transverse directions are integrally formed by injection molding by use of light transmissive resin as material in a manner so that respective flat surfaces of said plane convex lens and said plane concave cylindrical lens intersect with each other in an optical axis. ### Claim 4 An integral light transmission lens of a laser head in which a substantially semi-spherical plane convex lens capable of compressing a light beam in both a longitudinal and a transverse direction and a plane convex cylindrical lens capable of compressing said light beam in only one of said longitudinal and transverse directions are joined with each other on respective flat surfaces of said plane convex lens and said plane convex cylindrical lens. ### Claim 5 An integral light transmission lens of a laser head in which a substantially semi-spherical plane convex lens capable of compressing a light beam in both a longitudinal and a transverse direction and a plane concave cylindrical lens capable of compressing said light beam in only one of said longitudinal and transverse directions are joined with each other on respective flat surfaces of said plane convex lens and said plane concave cylindrical lens. ### Claim 6 (depends on 1) The light transmission lens according to claim 1, further comprising a slit in which a light absorbing layer is formed in a peripheral portion of a curved surface of said cylindrical lens. ### Claim 7 (depends on 1) The light transmission lens according to claim 1, wherein said laser head is a laser head of an optical distance measuring equipment. ### Claim 8 (depends on 7) The light transmission lens according to claim 7, wherein said laser head forms an irradiation surface having an aspect ratio of approximately 1 to 2. ### Claim 9 A light transmission lens of a laser head which is constituted by a combination of a convex lens and a cylindrical lens. ### Claim 10 (depends on 4) The light transmission lens according to claim 4, further comprising a slit in which a light absorbing layer is formed in a peripheral portion of a curved surface of said cylindrical lens. ### Claim 11 (depends on 12) The light transmission lens according to claim 12, further comprising a slit in which a light absorbing layer is formed in a peripheral portion of a curved surface of said cylindrical lens. ### Claim 12 (depends on 9) The light transmission lens according to claim 9, wherein said laser head is a laser head of an optical distance measuring equipment. ### Claim 13 (depends on 10) The light transmission lens according to claim 10, wherein said laser head is a laser head of an optical distance measuring equipment. ### Claim 14 (depends on 11) The light transmission lens according to claim 11, wherein said laser head is a laser head of an optical distance measuring equipment. ### Claim 15 (depends on 12) The light transmission lens according to claim 12, wherein said laser head is a laser head of an optical distance measuring equipment. ### Claim 16 A light transmission lens of a laser head, said lens comprising: a substantially semi-spherical lens surface capable of compressing a light beam in both a longitudinal and a transverse direction; and a substantially semi-cylindrical lens surface opposite said substantially semi-cylindrical lens surface, said substantially semi-cylindrical lens surface capable of compressing said light beam in only one of said longitudinal and transverse directions, wherein, said lens is homogeneously formed as a solid unitary body.