Abstract: Binoculars are provided with correction lenses which correct a trembling of a focused image. The correction lenses are driven by stepping motors. The difference between an angular position data of optical axes of the binoculars and a driving amount of the correction lenses driven by the stepping motors is calculated. If the difference exceeds a positive threshold value, the stepping motor is rotated clockwise, and if the difference is below a negative threshold value, the stepping motor is rotated counterclockwise in order to cancel the difference. When the difference is between the positive threshold value and the negative threshold value, the stepping motor is not rotated. The threshold value is determined to be a quarter of the driving amount of the correction lenses, which corresponds to one rotational step of the stepping motor.

Abstract: A taking lens consisting of a positive power single lens element positioned behind an aperture stop of a photographic camera having an image format of 16.7.times.30.2 mm, and having an object side surface which includes an annular marginal section surrounding a core section defined by an effective aperture thereof. The taking lens satisfies the following conditions:Dr<1.0Dc<0.75Ds<3.0whereDr is the radial width of the annular margin;Dc is the thickness of the core section in an extension of a straight line connecting the outer periphery of the core section and the center of curvature of an image side surface of the single lens element; andDs is the air space between the image side surface and the aperture stop.

Abstract: A composite micro-lens for use in an optical or magneto-optical information storage system, made up of one or more lens elements which, when coupled in assembly, provide a desired numerical aperture. The design may provide, if necessary, a photo resist lens, a shaped ball lens, or one or more contoured surfaces within the composite construction to correct for aberrations. The composite lens designed in this manner allowing for the use of wafer-level assembly processes to provide high volume production capabilities. It is further intended that this micro-lens design support integration in an optical or magneto-optical head design.

Abstract: A hemispheric lens of a single crystal having a refractive index of 2.0 or over is used as a SIL lens of an optical system for optical recording. The single crystal is LiNbO3, LiTaO3, rutile phase TiO2, PbMoO4, TeO2, SrTiO3, ZrO2, SrNbO3, SrTaO3, CaNbO3, CaTaO3, CaTiO3, KNbO3, KTaO3, BaZrO3, SrZrO3, CaZrO3, KNbO3, KTaO3, BaZrO3, SrZrO3, CaZrO3, ZnWO4, ZnMoO4, CdWO4, CdMoO4, PbWO4, Bi20SiO12, Bi20GeO12, Bi4Si3O12, Bi4Ge3O12, GaP, ZnTe, ZnSe, Cu3TaSe4 or ZnS.

Abstract: The invention comprises a real image zoom finder including an objective lens group, an erecting group, and an eyepiece lens group. The objective lens group includes a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a positive refractive power, and a fourth lens having a positive refractive power. The surface of the fourth lens closest to the image side of finder is convex and the second lens is biconvex. The real image zoom finder has a simple structure and good performance for all magnification ranges.

Abstract: A compact lens has a front lens group of positive refractive power and a rear lens group of negative refractive power. The front lens group is composed of, in order from a photographic object side, a negative lens element and a biconvex lens element having a surface of stronger curvature on the object side. Overall symmetry with respect to the rear lens group is achieved by using a negative meniscus lens element with its concave surface on the object side for the negative lens element in the front lens group. The rear lens group is composed of a negative meniscus lens element L.sub.3 with its concave surface on the object side. This provides a compact overall lens structure of the so-called telephoto type having only three lens elements, making it possible to boost optical performance while being inexpensive.

Abstract: A plastic lens has a flange provided with a reflecting plane, so that its inclination upon assembling can be detected and adjusted efficiently and accurately. This plastic lens has the flange at an outer periphery of an optically functioning portion. A surface of the flange surrounding the optically functioning portion is a reflecting plane perpendicular to an optical axis of the optically functioning portion.

Abstract: A drive apparatus for a zoom lens barrel having a plurality of movable lens groups, comprising: a lens barrel body which supports lens frames of the movable lens groups to move linearly in the optical axis direction, a lens drive unit which is assembled independently of the lens barrel body, driven pins provided on the lens frames and projecting outward from the barrel body in the same direction, and a plurality of drive members having engaging portions engageable with the driven pins. The drive motor which independently drives the drive members and drive gears connects the drive members to the drive motor, is provided in said lens drive unit. The lens drive unit is secured to the lens barrel body in a state that the driven pins projecting from the lens barrel body are engaged by the engaging portions of the corresponding drive members of the lens drive unit.

Abstract: A method and system are disclosed for implementing floating point exception enabled operation without substantial performance degradation. In a multiscalar processor system, multiple instructions may be issued and executed simultaneously utilizing multiple independent functional units. This is typically accomplished utilizing separate branch, fixed point and floating point processor units. Floating point arithmetic instructions within the floating point processor unit may initiate one of a variety of exceptions associated within invalid operations and as a result of the pipelined nature of floating point processor units an identification of which instruction initiated the exception is not possible. In the described method and system, an associated dummy instruction having a retained instruction address is dispatched to the fixed point processor unit each time a floating point arithmetic instruction is dispatched to the floating point processor unit.

Abstract: A system and method for modifying or enhancing the operation of a palmtop computer which intercepts keystrokes from the keyboard, reads the keyboard characters corresponding to the keystrokes, reads display data, and based on the current state of the display, the sequence of previous keystrokes, and other variables, either delivers the current keystroke character to the application program without change, with additional or replacement characters, or dumps the current keystroke character. The system and method alters the "look-and-feel" of the computer by providing easier ways to interact by the keyboard with the built-in application programs. The system and method may monitor display data between keystrokes and determine the identity of the particular active application program based on what the display screen is displaying. Keystrokes and the display state are monitored to determine if there are additional functions to be executed for the active application program.

Abstract: A method for automatically converting structured analysis tool outputs into an executable simulation model is disclosed. The method basically comprises a two step process. The first step in the process involves converting the outputs from anyone of a variety of structured analysis tools into a standard METAfile. This first step is accomplished through the use of a METAfile Conversion Program, which accesses the data bases of the various structured analysis tools and collects the necessary data. The second step in the process involves converting the standard METAfile into an executable simulation model. This second step is accomplished through the use of a Simulation Generation program, which accesses the standard METAfile and in a step by step process converts the blocks of METAfile data into simulation code in any of the standard simulation languages.

Abstract: After a logical page number is stored, upon execution of a branch instruction, into a logical page number section in an effective address register, an address converting buffer is retrieved in accordance with a value obtained by addition of "1" to a logical page number of an instruction being executed at present, and a physical page number for a page-over is stored into a page-over address register. Thereafter, when a page-over occurs, the output of the page-over address register is selected by a physical page number selecting circuit and stored into the physical page number section in the instruction address register.

Abstract: A system for splitting and connecting computer bus lines, including a ribbon cable with a flat end connector which is piggy-backed to the contact strip of a circuit board. The circuit board is then plugged into a bus slot with the flat end connector insulating selected terminal contacts of the slot from said contact strip. The ribbon connector is connected to the circuit board, the terminal contacts, the contract strip, or both. A control signal selector connected to the other end of the ribbon cable sends signals to one of several circuit boards so as to allow more than one work station to be supported by a single microprocessor.