US-12621426-B2 - Head-mountable display device and method for displaying an image received from a microscope

US12621426B2US 12621426 B2US12621426 B2US 12621426B2US-12621426-B2

Abstract

A head-mountable display device for displaying an image received from a microscope comprises a first display configured to display a first image of a part of an object, the first image received from a microscope. Further, the head-mountable display device comprises a first optical arrangement located in front of the first display. The first optical arrangement comprises at least one lens. Additionally, the head-mountable display device comprises a mounting structure configured to fasten the first display to the head of a user. The head-mountable display device is configured to allow a direct line of sight from a first eye of the user to the object in a field of view of the user outside of the first display while the user is watching the first display through the first optical arrangement, if the mounting structure is fastened to the head of a user. An angle between a display direction and the direct line of sight is less than 50° and the display direction is orthogonal to the first display.

Inventors

Manon Rostykus
Robert Paulus
Christian Marte
Gianluca PARGÄTZI

Assignees

LEICA INSTRUMENTS (SINGAPORE) PTE. LTD.

Dates

Publication Date: 20260505
Application Date: 20240802
Priority Date: 20200507

Claims (18)

1 . A head-mountable display device for displaying an image received from a microscope, comprising: a display configured to display an image received from a microscope; an optical arrangement located in front of the display; and a mounting structure configured to fasten the display to a head of a user, wherein the head-mountable display device is configured to allow a direct line of sight from an eye of the user to an object in a field of view of the user outside the display while the user is watching the display through the optical arrangement, if the mounting structure is fastened to the head of the user, wherein the optical arrangement comprises at least three lenses and each lens of the at least three lenses comprises different glass material.
2 . The head-mountable display device of claim 1 , wherein the mounting structure is configured to allow at least partial removal of the display from the field of view of the user.
3 . The head-mountable display device of claim 2 , wherein the mounting structure is configured to remove the display automatically in response to an identified event.
4 . The head-mountable display device of claim 1 , wherein the mounting structure is configured to be tilted relative to a reference plane of the head-mountable display device.
5 . The head-mountable display device of claim 1 , wherein each lens of the at least three lenses comprises a first surface and a second surface, and a sequence of first and second surfaces of the at least three lenses comprises a first spherical surface followed by a first aspherical surface followed by a second spherical surface followed by a second aspherical surface followed by a third spherical surface followed by a third aspherical surface.
6 . The head-mountable display device of claim 1 , wherein each lens of the at least three lenses comprises a first surface and a second surface, and a sequence of the first and second surfaces of the at least three lenses does not contain a diffractive surface.
7 . The head-mountable display device of claim 1 , wherein a total focal length of the optical arrangement is at most 30 mm and at least 15 mm.
8 . The head-mountable display device of claim 1 , wherein a focal length of a first lens of the at least three lenses is at most 25 mm and at least 15 mm.
9 . The head-mountable display device of claim 1 , wherein a focal length of a second lens of the at least three lenses is at most −15 mm and at least −5 mm.
10 . The head-mountable display device of claim 1 , wherein a focal length of a third lens of the at least three lenses is at most 20 mm and at least 10 mm.
11 . The head-mountable display device of claim 1 , wherein a first lens of the at least three lenses is a positive lens.
12 . The head-mountable display device of claim 1 , wherein a second lens of the at least three lenses is a negative lens.
13 . The head-mountable display device of claim 1 , wherein a third lens of the at least three lenses is a positive lens.
14 . The head-mountable display device of claim 1 , wherein a total weight of the at least three lenses is at most 30 g.
15 . The head-mountable display device of claim 1 , wherein a diameter of each lens of the at least three lenses is at most 25 mm.
16 . The head-mountable display device of claim 1 , wherein a total optimal distance between the display and the eye of the user caused by the optical arrangement is at most 60 mm.
17 . The head-mountable display device of claim 1 , wherein a display diagonal of the display is at least 0.5 inch and at most 1 inch.
18 . A method for displaying an image received from a microscope, comprising: receiving an image from a microscope; and displaying the image on a display of the head-mountable display device of claim 1 .

Description

TECHNICAL FIELD Examples relate to displaying microscope images on head-mountable displays and especially to head-mountable display devices and methods for displaying an image received from a microscope. BACKGROUND Microsurgery often demands a distortion-free magnified stereoscopic view of the operating field. Digital stereo microscopes can provide such views of the operating field. The image can be viewed through eye pieces at the microscope or may be displayed on an external screen or by head-mountable displays. SUMMARY An embodiment relates to a head-mountable display device for displaying an image received from a microscope. The head-mountable display device comprises a first display configured to display a first image of a part of an object, the first image received from a microscope. Further, the head-mountable display device comprises a first optical arrangement located in front of the first display. The first optical arrangement comprises at least one lens. Additionally, the head-mountable display device comprises a mounting structure configured to fasten the first display to the head of a user. The head-mountable display device is configured to allow a direct line of sight from a first eye of the user to the object in a field of view of the user outside of the first display while the user is watching the first display through the first optical arrangement, if the mounting structure is fastened to the head of a user. An angle between a display direction and the direct line of sight is less than 50° and the display direction is orthogonal to the first display. By allowing the user a direct line of sight to the object while using the head-mountable display device, it is easier for the user to interact with his direct environment (e.g. with other people or tools) in comparison to display devices, which completely or nearly completely blocking the view of the user. Another embodiment relates to a head-mountable display device for displaying an image received from a microscope. The head-mountable display device comprises a first display configured to display a first image of a part of an object, the first image received from a microscope. Further, the head-mountable display device comprises a mounting structure configured to fasten the first display to the head of a user. The mounting structure comprises a nose piece configured to align the first display to the first eye of the user. Further, the mounting structure is configured to rest less than 40% of the weight of the head-mountable display device through the nose piece on the nose of the user. The nose piece may enable a stable alignment of the display to the eye of the user. In this way, misalignments and movement of the display relative to the eye of the user can be significantly reduced or even completely avoided. On the other hand, the mounting structure enables a support of the main portion of the weight of the head-mountable display device on the head of the user but not on the nose. In this way, a high wearing comfort may be enabled. Another embodiment relates to a head-mountable display device for displaying an image received from a microscope. The head-mountable display device comprises a first display configured to display a first image of a part of an object, the first image received from a microscope. Further, the head-mountable display device comprises a mounting structure configured to fasten the first display to the head of a user. Additionally, the head-mountable display device comprises a first optical arrangement located in front of the first display. The first optical arrangement comprises three lenses. Further, at least one lens of the three lenses is an aspheric lens. By using at least three lenses between the display and the eye of the user, a good optical performance with respect to magnification and aberrations may be obtainable. By using at least one aspheric lens, the size and weight of the optical arrangement may be significantly reduced in comparison to a system using only spherical lenses. Therefore, a head-mountable display device with small size, low weight and good optical performance may be provided. SHORT DESCRIPTION OF THE FIGURES Some examples of apparatuses and/or methods will be described in the following by way of example only, and with reference to the accompanying figures, in which FIG. 1 is a schematic illustration of a head-mountable display device; FIG. 2 is a schematic illustration of another head-mountable display device comprising two displays; FIG. 3 is a schematic illustration of another head-mountable display device allowing an adjustment of the interpupillary distance; FIG. 4a is a schematic illustration of another head-mountable display device in a first state; FIG. 4b is a schematic illustration of the head-mountable display device of FIG. 4a in a second state; FIG. 5a is a side view of another head-mountable display device; FIG. 5b is a front view of the head-mountable display device of FIG. 5a; F