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Showing papers on "Tilt (optics) published in 1982"


Journal ArticleDOI
TL;DR: There were no significant differences in measurements of ocular counterrolling during static tilt between the normal subjects and the patient with the vestibular nerve section, in contrast to measures obtained during slow velocity dynamic testing.
Abstract: Two normal persons and a patient with unilateral vestibular nerve section were held motionless for ten minutes in the upright position, at 60° tilt right ear down, and at 60° tilt left ear down. In...

48 citations


Patent
David Trost1
06 Jul 1982
TL;DR: In this paper, the tilt and focus errors of a wafer in a mask projection system for a plurality of subfields on the wafer which vary in position according to a known scheme are corrected by three axial actuators operating on the variable X and Y coordinates of the center of each subfield.
Abstract: An apparatus automatically for correcting tilt and focus errors of a wafer in a mask projection system for a plurality of subfields on the wafer which vary in position according to a known scheme. The tilt and focus of each subfield on the wafer is individually corrected by three axial actuators operating on the variable X and Y coordinates of the center of each subfield and its tilt and focus errors.

41 citations


Journal ArticleDOI
TL;DR: In this paper, the variation of the relative energy of symmetrical tilt boundaries in nickel oxide was studied as a function of misorientation by measuring the angle of the groove formed following thermal etching of bicrystals.
Abstract: The variation of the relative energy of symmetrical 〈011〉 tilt boundaries in nickel oxide was studied as a function of misorientation by measuring the angle of the groove formed following thermal etching of bicrystals. Cusps on the energy curve were observed for high-coincidence angles.

36 citations


Patent
01 Mar 1982
TL;DR: In this paper, a rotatably mounted cathode ray tube has the ability to both tilt and swivel in order to provide a most advantageous angle at a working station, and a mounting plate is designed to tilt about the crosspiece, there being a frictional engagement between the cross-piece and a portion of the mounting plate.
Abstract: A device designed for mounting cathode ray tube has the ability to both tilt and swivel in order to provide a most advantageous angle at a working station. A cross-piece is rotatably mounted in a base and a mounting plate is designed to tilt about the cross-piece, there being a frictional engagement between the cross-piece and a portion of the mounting plate. This frictional engagement has provision for varying the amount of friction so as to lock or allow varying difficulty of tilt depending on the weight of the device to be mounted and the desire of the operator. The device is designed for one-handed operation.

36 citations


Patent
02 Aug 1982
TL;DR: In this article, a venetian blind tilt rod control system including a rotatable tilt rod and drive means for rotating the rod is presented, and a spring is provided for activating the connection means.
Abstract: A venetian blind tilt rod control system including a rotatable tilt rod and drive means for rotating the rod. Spring activated connection means operatively connect the drive means and tilt rod and a spring is provided for activating the connection means.

33 citations



Journal ArticleDOI
TL;DR: In this article, the forced-convection boiling of R-113 in electrically heated coils with a substantial heat flux tilt toward the outside of the coils is reported. And the quality region CHF condition (when unaffected by buoyancy) occurs at the inside surface of the coil and not at the location of highest heat flux.

30 citations


Journal ArticleDOI
TL;DR: In this article, a SiO oblique evaporation procedure for high-tilt-angle nematic liquid crystal alignment with no organic surfactants and no dopants is proposed.
Abstract: A new SiO oblique evaporation procedure for high-tilt-angle nematic liquid crystal alignment with no organic surfactants and no dopants is proposed. It covers a wide tilt range of 0° to 60° with respect to the substrate normal. In the procedure the azimuth of SiO beam changes continuously during evaporation, although the incident angle does not change. By choosing the azimuthal distribution of deposition, the tilt bias of the director can be controlled. The aligning layers are heatproof and should be of use in producing improved positive-type guest-host display devices.

27 citations


Patent
21 Jul 1982
TL;DR: A tilt and telescope steering wheel with a push button keyboard non-rotatably mounted within the steering wheel has a foot actuated release mechanism for simultaneous disengagement of tilt lock and telescope lock mechanisms as discussed by the authors.
Abstract: A tilt and telescope steering wheel with a push button keyboard non-rotatably mounted within the steering wheel has a foot actuated release mechanism for simultaneous disengagement of tilt lock and telescope lock mechanisms. A readout instrument panel with various indicators thereon rigidly attached to and tiltable with the steering column so as to provide a constant angular correlation with the steering wheel facilitating an unobstructed view of the panel in all steering wheel tilt positions.

26 citations


Journal ArticleDOI
TL;DR: In this paper, the stability of force-free spheromak plasmas to n = 1 free boundary tilt and radial shift modes was studied and the effect of line tying of the open field lines was found to improve stability greatly.
Abstract: Magnetohydrodynamic stability of force‐free spheromak plasmas to n = 1 free boundary tilt and radial shift modes is studied. The exterior region of open field lines is treated either as a conducting plasma or as a vacuum. In the former case the effect of line tying of the open field lines is present and is found to improve stability greatly. The equilibria which have optimum stability properties to the tilt and shift modes have a length‐to‐diameter ratio of 0.6, and can be stable with conducting walls at a relatively large distance.

25 citations



Journal ArticleDOI
TL;DR: A computer program was developed to compute the profile of multiple-beam Fizeau fringes and was tested against laboratory observations by using the program as a tool for studying the behavior of the fringes, a simplified model of the fringe formation process was developed as discussed by the authors.
Abstract: A computer program was developed to compute the profile of multiple-beam Fizeau fringes and was tested against laboratory observations By using the program as a tool for studying the behavior of the fringes, a simplified model of the fringe formation process was developed The shifts of the fringes from their expected locations are caused primarily by a reduction in spatial frequency that is due to the oblique projection of the fringes onto the detector The angle at which the fringes are inclined to the input beam of the interferometer may be calculated by using a phase law developed by Brossel [ Proc Phys Soc59, 224 ( 1947)] and is independent of the reflectivity of the cavity Once the orientations of the fringe planes and the detector are known, the fringe shifts may be calculated by using simple trigonometry Although the absolute shift of a particular fringe may be an appreciable fraction of a fringe spacing, neighboring fringes have nearly identical shifts, making the relative fringe shift inconsequential The finesse of the fringes may be increased by either tilting the Fizeau cavity or defocusing the detector optics Unlike the tilt angle required to minimize the fringe shift, the tilt angle that maximizes the finesse is a strong function of the cavity reflectivity


Patent
01 Apr 1982
TL;DR: In this paper, the authors present a control apparatus for automatic correction of sideways tilt for an orientable vehicle-mounted lifting arm (6, 7, 8, 9, 10), in particular for an extendible orientable ladder, including a turntable (4) which is orientable about an axis (4a) and which comprises a portion (5), which is pivoted about a substantially horizontal axis and displaced about said axis by an actuating means (19) for correcting sideways tilt, controlled by a member (25) providing electrical proportional control, the turnt
Abstract: 1. A control apparatus for automatic correction of sideways tilt for an orientable vehicle-mounted lifting arm (6, 7, 8, 9, 10), in particular for an extendible orientable ladder, including a turntable (4) which is orientable about an axis (4a) and which comprises a portion (5) which is pivoted about a substantially horizontal axis and displaced about said axis by an actuating means (19) for correcting sideways tilt, controlled by a member (25) providing electrical proportional control, the turntable being subjected to a pivoting actuator (18) with a control action proportional to an electrical signal representing the controlled speed of pivotal movement and comprising an electrical sensor for measuring the angle of pivotal movement (THETA) of the arm, characterised in that it comprises electrical sensors for measuring the slope of the vehicle in two directions which are transverse with respect to each other, associated with a microprocessor having inputs for acquisition of said slope measurements and further comprising stored in memory means a cyclic calculation sequence in respect of the theoretical speed of correction of sideways tilt as determined from the value of the signal representing the speed of pivotal movement and in dependence on the data from said electrical slope-measuring sensors, in order to supply at an output of the microprocessor which is connected to said member (25) for electrical proportional control of the tilt-correcting actuator (19), a signal which is representative of the speed of tilt correction linking said latter in respect of time to the speed of pivotal movement.

Journal ArticleDOI
TL;DR: It is found that the change in body position from upright to supine has no effect on the pattern of tilt aftereffect results obtained when a chevron is used as an inducing stimulus, and this proces is labelled the “purely binocular process”.

Journal ArticleDOI
TL;DR: An anomalous temperature dependence of pitch of the helicoidal SmC * structure near the Sm C * -Sm A transition point is investigated and attributed to the fluctuation effect of tilt angle as mentioned in this paper.
Abstract: An anomalous temperature dependence of pitch of the helicoidal Sm C * structure near the Sm C * -Sm A transition point is investigated and attributed to the fluctuation effect of tilt angle. The large fluctuation increases the number of turns in the helicoidal structure, and leads to such an anomalous behaviour near the transition point. The deviation of the electric field dependence of pitch from the prediction of the conventional theory in this temperature region is also interpreted as the effect of that fluctuation.

PatentDOI
TL;DR: A shock absorber and air spring assembly particularly adapted for use in a tilt-cab suspension system is described in this paper, which provides the capability of remotely adjusting the amount of damping of the damper piston on the upstroke and, to a lesser extent, on the down stroke as well.
Abstract: A shock absorber and air spring assembly particularly adapted for use in a tilt cab suspension system. It provides the capability of remotely adjusting the amount of damping of the damper piston on the upstroke and, to a lesser extent, on the down stroke as well.


Patent
24 Nov 1982
TL;DR: In this paper, a suspension system for a tilt cab truck is described in which the shock absorber assemblies adjacent the tilt axis are collapsed to their minimum stroke prior to the initiation of the tilt cycle and held there by hydraulic lock throughout the cycle.
Abstract: Disclosed is a suspension system for a tilt cab truck in which the shock absorber assemblies adjacent the tilt axis are collapsed to their minimum stroke prior to the initiation of the tilt cycle and held there by hydraulic lock throughout the tilt cycle.

Journal ArticleDOI
TL;DR: In this article, the imaging of tilted objects in a CTEM is treated from the point of view of a posteriori correction (e.g. as preliminary step for 3D reconstruction).

Journal ArticleDOI
TL;DR: A design for a stepped feedback mirror is proposed that substantially reduces the effect of edge diffraction on the resonator modes and predicted results are a more uniform intensity profile and greatly reduced tilt sensitivity.
Abstract: Diffractive feedback from the edge of the output mirror of an unstable resonator can cause intensity spikes and make the resonator sensitive to tilts. A design for a stepped feedback mirror is proposed that substantially reduces the effect of edge diffraction on the resonator modes. The predicted results are a more uniform intensity profile and greatly reduced tilt sensitivity.

Patent
13 Jul 1982
TL;DR: In this paper, a tilt-cab truck with a single pilot-operated check valve and two extra check valves is described, which is the same system safety as is conventionally provided with two pilot operated check valves.
Abstract: Disclosed is a tilt-cab truck including apparatus to secure uniform advance and retraction of the tilt cylinders. The system employs a single pilot-operated check valve instead of the conventional two pilot-operated check valves, but it employs two extra check valves to provide the same system safety as is conventionally provided with two pilot-operated check valves.

Journal ArticleDOI
TL;DR: In this article, the influence of a small deformation of CĈO angle in phenol (tilt), into the rotational far-infrared (FIR) spectrum is analyzed using several approaches.
Abstract: The influence of a small deformation of CĈO angle in phenol (tilt), into the rotational far-infrared (FIR) spectrum is analyzed using several approaches. In all of them, the CNDO/2 method is used to determine the potential energy functions. In a first step, the CO bond and the rotation axis are both supposed to coincide with the C2 symmetry axis of the phenyl group. With this assumption the torsional frequencies are calculated in both the symmetric and asymmetric rotor approximations. In a second step, the tilt of the COH bond is determined theoretically and found to be −3°, measured from the C2 symmetry axis, the COH bond crossing this axis, Using this second geometry, and taking as the rotation axis the C2 axis, the torsional frequencies are again determined in both approximations. An improvement of the calculated transition energies is encountered at each stage of the calculation, when compared with experimental data. Finally the importance of the introduction of a tilt into the FIR torsional frequency calculations is discussed.

Journal ArticleDOI
TL;DR: In this article, the relative directions of the cuts in the top and bottom plates of two parallel metallic plates of infinite extent, containing cuts at periodic intervals, are investigated for a number of cases.
Abstract: Waves guided by two parallel metallic plates of infinite extent, containing cuts at periodic intervals, are investigated for a number of cases with special emphasis upon the relative directions of the cuts in the top and bottom plates. Two fundamental slow-wave modes exist for all frequencies, in general. The latter are functions of tilt angles of the cuts, frequency, and plate separation. For tilt angles psi in the top and +- psi in the bottom plane, the amplitudes of the even and odd modes are independent of each other, while for other angles in the bottom plane a predetermined linear combination of even and odd terms exist for each mode.

Patent
27 Jan 1982
TL;DR: In this paper, a wavefront sensor is used to determine the angle error signal between the wavefront tilt angle and the mirror tilt angle, which is then used to drive the actuator unit.
Abstract: A mirror actuator control system utilizing a wavefront sensor to determine the resulting angle error signal between the wavefront tilt angle and the mirror tilt angle. The resulting angle error signal is used to drive the actuator unit which controls the mirror tilt angle.

Patent
09 Nov 1982
TL;DR: In this paper, the angular position of the optical axis of the objective is corrected for obliquity of the surface of an optical disc, and correction means (22A, B) are provided to tilt the objective through a correction angle, so that the angle between the orientation and the normal to the disc surface is reduced.
Abstract: An electro-optical apparatus comprises an objective which scans an optical disc (3) having a transparent protective layer (5) by means of a radiation beam (10) which, through the transparent layer, is focussed on a reflecting recording surface (4), the objective moving along the optical axis (19) for focussing the radiation beam on the recording layer and moreover performing limited pivotal movements. The angular position of the optical axis of the objective is corrected for obliquity of the surface of the optical disc, correction means (22A, B) being provided to tilt the objective through a correction angle, so that the angle between the optical axis and the normal to the disc surface is reduced.

Journal ArticleDOI
TL;DR: In this article, a tight-binding type electronic theory is used to calculate the configurational and electronic structures of coincidence-related tilt grain boundaries in bcc transition metals α-Fe, Mo and W. It is shown that the grain boundary structures depend sensitively on the species of transition metals and the asymmetric grain boundaries can be stabilized for certain transition metals.
Abstract: A tight-binding type electronic theory is used to calculate the configurational and electronic structures of coincidence-related tilt grain boundaries in bcc transition metals α-Fe, Mo and W. To obtain the atomic configurations near the grain boundaries, both electronic (d-band) and repulsive energies are calculated and minimized: The change in the d-band energy Δ E d is obtained using the second moment Gaussian approximation for the d-density of states (DOS), while the Born-Mayer potential is used to estimate the change in the short-range repulsive energies. It is shown that the grain boundary structures depend sensitively on the species of transition metals, and the asymmetric grain boundaries can be stabilized for certain transition metals. We also present the local DOS of d-electrons, calculated using the recursion method, on the atomic sites near the tilt grain boundaries.


Journal ArticleDOI
K.V. Chau1
TL;DR: In this paper, the optimal tilt angles for solar collectors at various latitudes were determined for all 12 months of the year for a cylindrically-curved transparent cover.

Journal ArticleDOI
TL;DR: In this paper, a method to grow niobium bicrystals using the electron beam floating zone technique is described, and it is shown that tilt boundaries can be obtained in large-size bicystals with an arbitrary misorientation angle.