摘要:
A light guide plate includes an incident surface on which light outputted from point light sources is incident and an outgoing surface for outputting light incident from the incident surface. A reflection-and-propagation surface for reflecting light toward the outgoing surface is formed in a back surface opposite to the outgoing surface. The outgoing surface is made up of a propagation region adjacent to the incident surface, a propagation auxiliary region adjacent to the propagation region, a first diffusion-and-propagation region adjacent to the propagation auxiliary region, and a second diffusion-and-propagation region adjacent to the first diffusion-and-propagation region. The propagation region, the propagation auxiliary region, and the first diffusion-and-propagation region control hot spots and bright/dark lines in vicinities of the incident surface, while the second diffusion-and-propagation region controls viewing-angle characteristics of the light guide plate.
摘要:
By using two probe optical systems for measurement by disposing the probe optical systems with a test object sandwiched therebetween, an optical path length of light transmitted through the test object which is identified locally is calculated using an interference signal thereof. In addition, a geometrical thickness of the same part is calculated by measuring positions of the probe optical systems, whereby two calculated values are obtained. Based on the values and a calculated value for a reference object, a refractive index distribution of the test object is obtained.
摘要:
A drive controller of a lens apparatus including a first lens unit moving for performing manual focus and a second lens unit moving for performing auto-focus has a control device switchable between a first mode for performing an auto-focus control of the second lens unit and a second mode for making the second lens unit unmovable at a predetermined position. The control device has a third mode for controlling drive of the second lens unit, upon receiving a command for switching from the first mode to the second mode, so as to maintain a focus state of the lens apparatus, on the basis of positional information of the first lens unit. The controller moves to the second mode upon detecting that the second lens unit has reached the predetermined position in the third mode.
摘要:
A two-dimensional scanning device possesses: a light source for emitting light; a mirror for scanning on a test surface in the X direction; a mirror for scanning on the test surface in the Y direction; a lens which has different powers in relation to the X direction and the Y direction; and a lens which has different powers in relation to the X direction and the Y direction. The mirrors are arranged between the light source and a lens group including the lenses.
摘要:
A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power configured not to move for zooming, a second lens unit having a negative refractive power configured to move during zooming, a third lens unit having a positive refractive power configured to move during zooming, and a fourth lens unit having a positive refractive power configured not to move for zooming. The third lens unit includes a positive lens, a negative lens, and a diffractive optical element. A focal length of the third lens unit (fc), a focal length of the diffractive optical element (fdoe), a focal length at a wide angle end of the zoom lens (fW), and a focal length at a telephoto end of the zoom lens (fT) satisfy the following conditions: 0.35
摘要:
An embodiment of the invention is a log management system analyzing and managing a log acquired in a computer. It generates log groups each formed of log records with reference to the log. It identifies active periods, in each of which a display area is active, in the log groups, and compares a start-to-end period from a start time to an end time of a reference log group selected from the log groups with active periods of subject log groups other than the reference operation log group individually to identify one or more subject log groups having an active period included in the start-to-end period. It individually determines whether to include the identified one or more subject log groups in the same first cluster as the reference log group, based on an active period length of each of the identified one or more subject log groups within the start-to-end period.
摘要:
By using two probe optical systems for measurement by disposing the probe optical systems with a test object sandwiched therebetween, an optical path length of light transmitted through the test object which is identified locally is calculated using an interference signal thereof. In addition, a geometrical thickness of the same part is calculated by measuring positions of the probe optical systems, whereby two calculated values are obtained. Based on the values and a calculated value for a reference object, a refractive index distribution of the test object is obtained.
摘要:
In an embodiment, a client acquires an operation log of operations in the client. A management system acquires a first operation log group consisting of operation log records including an operation log record of an operation in which a first problem is generated from the operation log. The management system stores in advance problem examples associated with operation log groups each consisting of operation log records and with solutions. The management system searches the operation log groups associated with the stored problem examples for an operation log group determined to be similar to the first operation log group based on the operation log records of the first operation log group. The management system determines a solution to one of the problem examples that is associated with the operation log group determined to be similar to the first operation log group, as a solution candidate to the first problem.
摘要:
On each of an optical axis of light entering a measurement object and an optical axis of light entering a reference mirror, compound lens whose achromatic condition, beam diameter condition, and color difference reduction condition are optimized using the focal length and/or the Abbe number of a collimator lens are placed. By correcting the wavefront by using the compound lens, the effect of the wavefront aberration is reduced, and the resolution in the shape measurement based on the optical interferometry is increased.
摘要:
A zoom lens includes a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power or a negative refractive power. The lens groups are arranged in order from the object side toward the image side. The focal lengths of the system at a wide angle end and a telephoto end, the focal lengths of the first and second lens groups, the distance between the position of the first lens group, the position being closest to the object side upon zooming, and the position of the first lens group at the wide angle end, and the difference between the largest distance between the first and second lens groups upon zooming and the distance between the first and second lens groups at the wide angle end are determined.