A projector includes a projection section, a position adjuster, and an enclosure. The projection section includes a holder that holds a plurality of lenses and a movable frame element provided with the holder to be pivotable around the optical axis of the plurality of lenses and caused to pivot to move a movement target lens out of the plurality of lenses along the optical axis. The position adjuster includes an arm member connected to the movable frame element and caused to pivot along with the movable frame element, an operation member provided to be pivotable around a pivotal axis substantially parallel to the optical axis and caused to pivot when an end portion of the operation member that is the end portion opposite the arm member is moved, and a linkage mechanism that links the arm member to the operation member and causes the arm member to pivot in response to the pivotal motion of the operation member. The pivotal axis of the operation member is closer to the end portion opposite the arm member than to the end portion facing the arm member.

Provided are a projection apparatus and a projection method capable of uniformly projecting a projection image, in which blurring is suppressed, onto a projection target having projected and recessed portions outside the focal depth of a projection lens by using the afterimage effect. The projection apparatus includes: a light source; a projection image generation unit; a projection lens that projects a projection image generated by the projection image generation unit onto a projection target having projected and recessed portions, where a defocus optical transfer function at a specific frequency has two or more local maximum values and a second largest local maximum value is equal to or greater than 0.5 times a first largest local maximum value; an oscillation mechanism that oscillates the projection lens in a direction of an optical axis T; and a control unit that controls an amplitude and a period of the oscillation mechanism.

An information processing apparatus including a determination unit that acquires a first detection result and a second detection result. The first detection result indicates information regarding at least one of a position and an orientation of a projection unit. The projection unit causes display information to be displayed by projecting the display information onto a projection plane. The second detection result indicates a spatial positional relationship between the projection unit and the projection plane. The information processing apparatus further includes a control unit that controls an operation of the projection unit on a basis of the first detection result and the second detection result.

According to one embodiment, an image projection device is provided. The image projection device includes an opto-mechanical module, a projection lens, and a lens adjusting mechanism. The opto-mechanical module is used for generating an image light. The projection lens is located on the path of the image light. The lens adjusting mechanism includes an outer ring rotating member, a transmission strip, a first fastener, and a driving mechanism. The outer ring rotating member is disposed on the projection lens, and the outer ring rotating member is used to drive the projection lens to rotate along an axis. The transmission strip surrounds the outer ring rotating member on the projection lens. The first fastener is fixedly connected to the transmission strip and the outer ring rotating member. The driving mechanism is connected to the transmission strip to drive the transmission strip and the outer ring rotating member to rotate.

A projection display apparatus includes a controller provided inside a projection optical system that projects an image on a projection surface and configured to control driving of a focus unit that provides focusing of a projection image on the projection surface, a shifter configured to move the projection optical system on a plane orthogonal to an optical axis of the projection optical system, and an acquirer configured to acquire positional information of the shift unit. The controller sets a driving condition of the focus unit using positional information of the shift unit and a relationship between an image height and a depth of field of the projection optical system.

A projection display apparatus includes a controller provided inside a projection optical system that projects an image on a projection surface and configured to control driving of a focus unit that provides focusing of a projection image on the projection surface, a shifter configured to move the projection optical system on a plane orthogonal to an optical axis of the projection optical system, and an acquirer configured to acquire positional information of the shift unit. The controller sets a driving condition of the focus unit using positional information of the shift unit and a relationship between an image height and a depth of field of the projection optical system.

According to the present invention there is provided a method of projecting images of sewing patterns as templates onto fabrics. The contemplated application for the invention includes sewist making an article of clothing. As such, images of the patterns to be sewn are stored in a storage device for latter access from a computing device that sends them to a projecting device for projection. The projecting devices is then positioned, graduated, calibrated, and set for optimizing the cutting of the fabric. Thereafter, the operator may interactively modify the projected image, and as such initiates the cutting of the fabric, in accordance to the projected sewing patterns.

According to the present invention there is provided a method of projecting images of sewing patterns as templates onto fabrics. The contemplated application for the invention includes sewist making an article of clothing. As such, images of the patterns to be sewn are stored in a storage device for latter access from a computing device that sends them to a projecting device for projection. The projecting devices is then positioned, graduated, calibrated, and set for optimizing the cutting of the fabric. Thereafter, the operator may interactively modify the projected image, and as such initiates the cutting of the fabric, in accordance to the projected sewing patterns.

The autofocus control system of a projector includes a projector and an imaging unit. The projector includes a lens actuator that drives a projection lens, and a first controller that projects a first or a second pattern image selected, the second pattern image being mesh-shaped more coarsely than the first pattern image. The imaging unit includes an imaging part that images the first or second pattern image selected to generate imaged data, a user interface part that acquires a zoom magnification, and a second controller that transmits a focus control command to the first controller based on the imaged data. The second controller transmits to the first controller, an instruction signal for selectively projecting the first pattern image when the zoom magnification is smaller than a given magnification, and an instruction signal for selectively projecting the second pattern image when the zoom magnification is the given magnification or larger.

To enable scanning using measurement light with a small-sized displacement measuring apparatus. The displacement measuring apparatus includes a MEMS mirror for scanning using measurement light that is output from a light projection lens. The light projection lens has a focus position, at which the measurement light is condensed, at the MEMS mirror or in the vicinity of the MEMS mirror on an optical axis of the measurement light. The measurement light that is reflected at the MEMS mirror spreads in a strip-shaped manner as the measurement light comes close to a measurement region.