3results about How to "Guaranteed collimation" patented technology

This invention discloses a cryostat cold mass assembly, including a cryostat base plate, a cold mass support unit, and a support assembly. The cold mass support unit is slidably fixed to the top of the cryostat base plate via the support assembly. At room temperature, the cold mass support unit is pre-offset relative to the cryostat base plate, and the pre-offset amount is the amount of material contraction at low temperatures. In this invention, by pre-offsetting the cold mass support unit at room temperature, the entire cryostat returns to the centerline position when it contracts at low temperatures, thereby ensuring that the centerline does not shift at low temperatures and guaranteeing alignment at low temperatures.

The present application relates to a parent-child optical lens, which comprises a lens frame, a first carrier and a second carrier and a first lens and a second lens installed in the lens frame, the first carrier is located in the second carrier and can move relative to the second carrier. The first side of the second carrier has a sliding fitting structure and a fitted first track; the second driving device for driving the second carrier comprises a piezoelectric element, a vibration starting part and a driven part, the driven part is linear and serves as the second track; the vibration starting part mechanically vibrates under the driving of the piezoelectric element attached to its surface and moves along the optical axis relative to the second track, and the moving range is at least 6 mm. The vibration starting part is arranged in the interior of the lens frame and is fixed to the lens frame or the second carrier through a mounting part; the moving stroke of the vibration starting part is limited to the middle section area of the lens frame. The present application also provides a corresponding camera module.

The utility model relates to the technical field of optical fiber manufacturing, in particular to a preform rod clamping device which comprises a lifting part mounted on a platform, an arc plate fixed at the moving end of the lifting part, a through hole formed in the arc plate, a metal positioning ball arranged on the arc plate and tangent to the through hole, an insertion hole formed in the metal positioning ball and used for inserting a preform rod, and a clamping part arranged on the lifting part and used for clamping the preform rod. And a locking piece arranged on the outer side of the metal positioning ball is used for fixing. According to the preform rod clamping device, the bolt with the rubber head is arranged as a locking piece, so that clamping marks on the surface of a preform rod are avoided, the product quality is protected, the arc plate is lifted by utilizing the linear module, and a structure that a metal positioning ball is tangent to a through hole is matched, so that natural vertical falling is realized, and collimation and vertical motion tests of the preform rod are ensured; the refractive index performance of the preform is analyzed, vertical and accurate positioning of the preform is facilitated, test result deviation is reduced, and therefore the structure is relatively simple, operation is convenient, and production detection requirements are met.