Adaptive particle projection path indicator

1. An aiming system for use with a particle projection device, the aiming system comprising:

a housing mountable to the particle projection device for movement therewith;

a window supported by the housing and defining a first field of view when the housing is at a first orientation and a second field of view when the housing is at a second orientation;

wherein a first reticle image is visible in the window when the housing is at the first orientation with the first reticle image representative of a projection path of the particles in the first field of view; and

wherein a second reticle image is visible in the window when the housing is at a second orientation with the second reticle image being representative of a projection path of the particles in the second field of view.

2. The aiming system of claim 1 , wherein the window has a hologram movable relative to the housing and arranged to move so that the first reticle image is viewable in the field of view through the window when the housing and particle direction device are in a first orientation and to move so that the second reticle image is viewable in the field of view through the window when the housing and the particle projection device are in a second orientation.

3. The aiming system of claim 1 , wherein the window has a hologram that may be illuminated from one of a first light source that causes the first reticle image to be visible in the window and a second light source that causes the second reticle image to be visible in the window and a decision is made between illuminating the first light source and illuminating the second light source based upon a sensed orientation.

4. The aiming system of claim 3 wherein the first light source is at a first position relative to the hologram and the second light source is at a second position relative to the hologram.

5. The aiming system of claim 1 , wherein the window has a hologram illuminated by at least one of a pivoting light source or a reflector that are allowed to mechanically pivot with changes in orientation to mechanically pivot to change the orientation of illumination of the hologram and change the reticle between the first reticle and the second reticle.

6. The aiming system of claim 1 , wherein the window has a hologram illuminated by a light source that can change wavelengths so that a reticle viewable in the window includes either the first reticle image or the second reticle image.

7. The aiming system of claim 1 , wherein the window has a hologram in the window illuminated by a laser and a laser mode is switched between a first mode that illuminates the hologram to cause a first reticle pattern to appear in the window and a second mode that illuminates the hologram to cause a second reticle pattern to appear in the window.

8. The aiming system of claim 1 , further comprising an electronic tilt sensor sensing an orientation of the aiming system and causing the first reticle image to be presented when a first orientation is sensed and causing the second reticle image to be presented when a second orientation is sensed.

9. The aiming system of claim 1 , wherein at least one of the first reticle image and the second reticle image can be detected by sensors that sense non-visible wavelengths of light.

10. The aiming system of claim 1 , wherein at least one of the first reticle image and the second reticle image takes the form of an arrangement of light emitting material.

11. The aiming system of claim 1 , wherein at least one of the first reticle image and the second reticle image comprises a pattern of light absorbing materials.

12. The aiming system of claim 1 , wherein at least one of the first reticle image and the second reticle image comprises an image formed on a liquid crystal display.

13. The aiming system of claim 12 , wherein the housing is a housing of the particle projection device.