BACKGROUND

1. Field

The present disclosure relates to optics, more specifically to eyecups for optics.

2. Description of Related Art

Elastic eyecups are typically used on optical equipment for the user comfort and reduction of ambient light noise. However, in some cases emission of the light from the device is not desirable. Mechanical shutters or electric switches can be used to power up and down digital eye displays as needed to eliminate light emission. Traditional designs may utilize hall-effect switches and a strong magnet in a“normal to face” configuration. Such arrangements require a strong and precisely selected magnet since the magnet must provide required magnetic flux density at a specific distance. The magnetic flux density changes with temperature and magnets are made within a certain tolerance, thus it is very difficult to maintain a specified switching distance that allow traditional eyecup to function.

Such conventional methods and systems have generally been considered satisfactory for their intended purpose. However, there is still a need in the art for improve eyecups for optics. The present disclosure provides a solution for this need.

SUMMARY

An eyecup for an optic can include a resilient (e.g.,. elastic) body forming an eye receiver and a viewing cavity, the elastic body configured to move between a relaxed state and a compressed state. The eyecup can include a diaphragm formed from or attached to an inner surface of the elastic body, the diaphragm including one or more flaps configured to be in a closed position when the elastic body is in the relaxed state such that the one or more flaps block sight of an optic through the viewing cavity, and to be in an open position when the elastic body is in the compressed state such that the one or more flaps allow sight of an optic through the viewing cavity.

The eyecup can include one or more magnets disposed on at least one of the one or more flaps to move with the one or more flaps, and one or more sensors disposed in a fixed location (e.g., relative to the portion of the eyecup that is fixed relative to the optic), e.g., such as on or in the elastic body, and configured to sense a magnetic field or flux thereof of the one or more magnets to sense the one or more magnets when the flaps are in or near or moving toward the open position. The one or more sensors can be connected to an optic to cause the optic to activate an optic display when the one or more sensors sense the one or more magnets in or near or moving toward the open position.

The one or more sensors can be disposed on an inner surface of the elastic body within viewing cavity. In certain embodiments, the one or more sensors can be disposed on an outer diameter of the elastic body, or embedded within the elastic body, or any combination thereof.

The one or more magnets can be disposed on an optic side of the one or more flaps of the diaphragm. Any other suitable position is contemplated herein. The one or more magnets can include at least one magnet disposed on a plurality of flaps. The one or more sensors can include a sensor for each flap that includes the at least one magnet. In certain embodiments, each flap can include at least one magnet.

In certain embodiments, the one or more magnets can be permanent magnets and the one or more sensors are Hall-effect sensors. Any suitable magnet (e.g., permanent and/or

electromagnet) or sensor type configured to sense when the one or more flaps are in the open position is contemplated herein.

In certain embodiments, the one or more sensors can be connected to an optic display controller to send sensor signals thereto. The optic display controller can be configured to determine if a threshold number and/or pattern of sensors sense the one or more magnets to activate the optic display.

In accordance with at least one aspect of this disclosure, an optic (e.g., for a firearm or other suitable device) can include an optic display configured to emit light and be viewed by a user, and an eyecup. The eyecup can include any suitable eyecup disclosed herein.

These and other features of the systems and methods of the subject disclosure will become more readily apparent to those skilled in the art from the following detailed description taken in conjunction with the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

So that those skilled in the art to which the subject disclosure appertains will readily understand how to make and use the devices and methods of the subject disclosure without undue experimentation, embodiments thereof will be described in detail herein below with reference to certain figures, wherein:

Fig. 1 is a perspective cross-sectional view of an embodiment of an eyecup in accordance with this disclosure, shown in a relaxed state;

Fig. 2 is a cross-sectional elevation view of the embodiment of Fig. 1;

Fig. 3 is a perspective cross-sectional view of the embodiment of Fig. 1, shown in a compressed state;

Fig. 4 is a side cross-sectional elevation view of the embodiment of Fig. 3; and

Fig. 5 is a schematic view of an embodiment of an optic in accordance with this disclosure.

DETAILED DESCRIPTION

Reference will now be made to the drawings wherein like reference numerals identify similar structural features or aspects of the subject disclosure. For purposes of explanation and illustration, and not limitation, an illustrative view of an embodiment of an eyecup in accordance with the disclosure is shown in Fig. 1 and is designated generally by reference character 100. Other embodiments and/or aspects of this disclosure are shown in Figs. 2-5.

Referring to Figs. 1-4, an eyecup 100 for an optic (e.g., a rifle scope having a display that emits light) can include an elastic body 101 (e.g., made of rubber, silicone, or any other suitable material) forming an eye receiver 103 and a viewing cavity 105. The elastic body 101 can be configured to move between a relaxed state (e.g., as shown in Figs. 1 and 2) and a compressed state (e.g., as shown in Figs. 3 and 4). For example, when the eyecup 100 is mounted to an optic (e.g., on a firearm), a user can press the user’s face against the eye receiver 103 and advance the elastic body 101 by pushing forward.

The eyecup 100 can include a diaphragm 107 formed from or coupled (e.g., attached) to an inner surface 109 of the elastic body 101. The diaphragm 107 can include one or more flaps 111 configured to be in a closed position (e.g., as shown in Figs. 1 and 2) when the elastic body 101 is in the relaxed state such that the one or more flaps 111 block sight of an optic through the viewing cavity 105. The one or more flaps 111 can be configured to be in an open position (e.g., as shown in Figs. 3 and 4) when the elastic body 101 is in the compressed state such that the one or more flaps 111 allow sight of an optic through the viewing cavity 105.

The eyecup 100 can include one or more magnets 113 disposed on at least one of the one or more flaps 111 to move with the one or more flaps 111. The eyecup 100 can also include one or more sensors 115 disposed in a fixed location (e.g., relative to the portion of the eyecup that is fixed relative to the optic), e.g., such as on or in the elastic body 101. The one or more sensors 115 can be configured to sense a magnetic field or flux thereof of the one or more magnets 113 to sense the one or more magnets 113 when the flaps 111 are in or near or moving toward the open position. The one or more sensors 115 can be connected to an optic to cause the optic to activate an optic display (e.g., an LCD or LED screen) when the one or more sensors 115 sense the one or more magnets 113 in or near or moving toward the open position.

The one or more sensors 115 can be disposed on the inner surface (e.g., as shown in Figs. 1-4) of the elastic body 101 within viewing cavity 105. In certain embodiments, the one or more sensors 115 can be disposed on an outer diameter of the elastic body 101, or embedded within the elastic body 101, or any combination thereof.

The one or more magnets 113 can be disposed on an optic side of the one or more flaps 111 of the diaphragm 107. Any other suitable position is contemplated herein. The one or more magnets 113 can be attached in any suitable manner (e.g., via an adhesive, bonding, friction fit in molded pockets in the one or more flaps 111, or integrally formed inside the elastic material to be integrated to the one or more flaps 111).

The one or more magnets 113 can include at least one magnet 113 disposed on a plurality of flaps 111. The one or more sensors 115 can include a sensor 115 for each flap 111 that includes at least one magnet 113. In certain embodiments, as shown, each flap 111 can include at least one magnet 111. A plurality of sensors 115 can be equally spaced around the inner surface 109 of the elastic body 101 to align with the location of the magnets 113 on flaps 111 in the open position.

In certain embodiments, the one or more magnets 113 can be permanent magnets and the one or more sensors 115 can be Hall-effect sensors. Any suitable magnet (e.g., permanent and/or electromagnet) or sensor type configured to sense when the one or more flaps 111 are in the open position is contemplated herein.

In certain embodiments, the one or more sensors 115 can be connected to an optic display controller (e.g., controller 503 as shown in Fig. 5) to send sensor signals thereto. The optic display controller can be configured to determine if a threshold number and/or pattern of sensors 115 sense the one or more magnets 113 to activate the optic display. For example, to prevent erroneous activation (e.g., due to skewed deformation of the elastic body 101 that causes some of the flaps 111, but not all, to open at least partially), the controller can require at least two sensors 115 (e.g., on opposite sides of the cavity 105) to sense magnets 113 before activating the optic display. In certain embodiments, as a means to provide sensitivity to activate in a skew condition (e.g., due to a user’s imperfect actuation of the elastic body 101), the controller can be configured to activate the display if a single sensor 115 (or any other suitable number) of a plurality of sensors 115 senses a magnet 113.

Referring additionally to Fig. 5, in accordance with at least one aspect of this disclosure, an optic 500 can include an optic display 501 configured to emit light and be viewed by a user, and an eyecup (e.g., eyecup 100 as described above). The optic 500 can include an optic display controller 503, e.g., as described above.

Embodiments of an optic and/or eyecup as disclosed herein can be used for any suitable device, e.g., a weapon scope (e.g., night vision, thermal, and/or other scopes for firearms), digital scopes, binoculars, microscopes, night vison devices, virtual and augmented reality googles, cameras, monitoring systems, or any optical device sensitive to light pollution.

Embodiments can include or be used with a scope for a firearm. Embodiments require a user to press the eyecup in to the compressed state to allow a display to be seen, which prevents light emission from the optic when not in use, e.g., avoids detection during use at night, for example. Embodiments can use magnets are much smaller and less expensive than traditional embodiments. Existing sensors are face mounted (facing the user eye) and use only a single large, expensive ring magnet that axially moves to activate face mounted sensors.

In certain embodiments, in the relaxed state, the sensors 115 are not activated due to a large distance and perpendicular orientation of the magnetic field with respect to the branded face of the Hall-effect sensors. When the eyecup is compressed, the diaphragm opens and the magnets move to a very close proximity with the sensors. Since the magnetic flux density grows rapidly with the reduction of the distance, even weak magnets can provide sufficient magnetic flux density to engage the sensors.

Accordingly, the single piece, powerful, and bulky permanent magnet of traditional designs can be replaced with one or more, small, lightweight, and low power magnets.

Embodiments can eliminate the risk of breaking or cracking of the magnet. Also, unlike the high power magnet, the smaller, lower power magnets attract much less ferrous debris and external objects. In embodiments, the orientation and close proximity of the magnets with respect to the sensors in a switching position eliminates the need of a tight control of the magnetic and geometrical parameters of the magnets and the negative effect of temperature on the switching position.

Any suitable combination(s) of any disclosed embodiments and/or any suitable portion(s) thereof are contemplated herein as appreciated by those having ordinary skill in the art.

Those having ordinary skill in the art understand that any numerical values disclosed herein can be exact values or can be values within a range. Further, any terms of approximation (e.g.,“about”,“approximately”,“around”) used in this disclosure can mean the stated value within a range. For example, in certain embodiments, the range can be within (plus or minus) 20%, or within 10%, or within 5%, or within 2%, or within any other suitable percentage or number as appreciated by those having ordinary skill in the art (e.g., for known tolerance limits or error ranges).

The embodiments of the present disclosure, as described above and shown in the drawings, provide for improvement in the art to which they pertain. While the subject disclosure includes reference to certain embodiments, those skilled in the art will readily appreciate that changes and/or modifications may be made thereto without departing from the spirit and scope of the subject disclosure.

Examples

Various examples are provided below by way of illustration.

In a 1 st example, an eyecup for an optic comprises: an elastic body forming an eye receiver and a viewing cavity, the elastic body configured to move between a relaxed state and a compressed state; a diaphragm formed from or attached to an inner surface of the elastic body, the diaphragm comprising one or more flaps, wherein the one or more flaps are configured to be in a closed position when the elastic body is in the relaxed state such that the one or more flaps block sight of an optic through the viewing cavity, wherein the one or more flaps are configured to be in an open position when the elastic body is in the compressed state such that the one or more flaps allow sight of an optic through the viewing cavity; one or more magnets disposed on at least one of the one or more flaps to move with the one or more flaps; and one or more sensors disposed in a fixed location and configured to sense a magnetic field or flux thereof of the one or more magnets to sense the one or more magnets when the flaps are in or near or moving toward the open position.

In a 2nd example, the eyecup of example 1, wherein the one or more sensors are connected to an optic to cause the optic to activate an optic display when the one or more sensors sense the one or more magnets in or near or moving toward the open position.

In a 3rd example, the eyecup of any of examples 1-2, wherein the one or more sensors are disposed on an inner surface of the elastic body within viewing cavity.

In a 4th example, the eyecup of any of examples 1-3, wherein the one or more magnets are disposed on an optic side of the one or more flaps of the diaphragm.

In a 5th example, the eyecup of any of examples 1-4, wherein the one or more magnets include at least one magnet disposed on a plurality of flaps.

In a 6th example, the eyecup of any of examples 1-5, wherein the one or more sensors include a sensor for each flap that includes the at least one magnet.

In a 7th example, the eyecup of any of examples 1-6, wherein each flap includes at least one magnet.

In a 8 ^th example, the eyecup of any of examples 1-7, wherein the one or more magnets are permanent magnets, and wherein the one or more sensors are Hall-effect sensors.

In a 9th example, the eyecup of any of examples 1-8, wherein the one or more sensors are connected to an optic display controller to send sensor signals thereto, and wherein the optic display controller is configured to determine if a threshold number and/or pattern of sensors sense the one or more magnets to activate the optic display.

In a lOth example, an optic comprises: an optic display configured to emit light and be viewed by a user; and an eyecup comprising: an elastic body forming an eye receiver and a viewing cavity, the elastic body configured to move between a relaxed state and a compressed state; a diaphragm formed from or attached to an inner surface of the elastic body, the diaphragm comprising one or more flaps, wherein the one or more flaps are configured to be in a closed position when the elastic body is in the relaxed state such that the one or more flaps block sight of an optic through the viewing cavity, wherein the one or more flaps are configured to be in an open position when the elastic body is in the compressed state such that the one or more flaps allow sight of an optic through the viewing cavity; one or more magnets disposed on at least one of the one or more flaps to move with the one or more flaps; and one or more sensors disposed in a fixed location and configured to sense a magnetic field or flux thereof of the one or more magnets to sense the one or more magnets when the flaps are in or near or moving toward the open position.

In a 1 lth example, the optic of example 10, wherein the one or more sensors are connected to an optic to cause the optic to activate an optic display when the one or more sensors sense the one or more magnets in or near or moving toward the open position.

In a l2th example, the optic of any of examples 10-11, wherein the one or more sensors are disposed on an inner surface of the elastic body within viewing cavity.

In a l3th example, the optic of any of examples 10-12, wherein the one or more magnets are disposed on an optic side of the one or more flaps of the diaphragm.

In a l4th example, the optic of any of examples 10-13, wherein the one or more magnets include at least one magnet disposed on a plurality of flaps.

In a l5th example, the optic of any of examples 10-14, wherein the one or more sensors include a sensor for each flap that includes the at least one magnet. In a l6th example, the optic of any of examples 10-15, wherein each flap includes at least one magnet.

In a l7th example, the optic of any of examples 10-16, wherein the one or more magnets are permanent magnets, and wherein the one or more sensors are Hall-effect sensors.

In a 18th example, the optic of any of examples 10-17, wherein the one or more sensors are connected to an optic display controller to send sensor signals thereto, and wherein the optic display controller is configured to determine if a threshold number and/or pattern of sensors sense the one or more magnets to activate the optic display.