SIRCHIE LTF100 Handbuch

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100 HUNTER PLACE, YOUNGSVILLE, NC 27596 USA

Ph: (919) 554-2244, (800) 356-7311 • Fax: (919) 554-2266, (800) 899-8181 • Web: www.sirchie.com • Email: [email protected]

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SIRCHIE®

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TECHNICAL INFORMATION

Laser Trajectory Finder Kit

Catalog No. LTF100

INTRODUCTION

Laser projection is the newest and most accurate method

used to determine projectile trajectories at crime scenes.

The laser is attached to a penetration rod, which is then

inserted into a bullet hole so that the laser beam can help

to determine the direction and angle from the source. It

may also be used to locate bullet exit points and other pos-

sible impact locations. The laser may be used with penetra-

tion rods and centering cones inserted into bullet holes, or

it may be used with the tripod mount to project its beam

through bullet holes.

The No. LTF100 Laser Trajectory Finder Kit includes a

high quality Laser Pointer, Centering Cones, Laser Con-

nectors, Universal Tripod Mount, Bullet Tips, Ballistic

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Angle Finder, Stringing Tips for attaching Colored Trajectory String, Multi-Colored Photographic Rods, and

Bullet Penetration Rods all contained in a handy carrying case.

EXPLANATION OF PRINCIPAL COMPONENTS

Ballistic Laser Pointer—This is a Class IIIa laser diode with an output of <5mW and operating at a fre-

quency of 630-680nm. Three L1154 batteries power the laser. It has a momentary ON/OFF switch with a

moveable collar, which, when moved into position, permits constant ON. The laser may be mounted on

the end of one of the Penetration Rods with a laser connector or it may be attached to the Universal Tri-

pod Mount for use with a photographic-type tripod.

Penetration Rods—Four aluminum Penetration Rods are supplied in the kit. These are inserted into bullet

holes to give a visual approximation of bullet trajectory. To facilitate entry into the bullet hole, one end of

the rod is machined with a bullet-like tip. To gain a more accurate gauge of trajectory, Centering Cones are

slipped onto the rod, one at the point of entry and one at the exit hole. These cones are then held in place

by O-Rings. The taper of the cones provides a snug t, thus providing more stable positioning of the rod.

Multi-Colored Photographic Rods—Six multi-colored rods are included to provide good photographic con-

trast at the crime scene. The Photographic Rods are attached to the Penetration Rods already positioned in

the bullet holes or may be used in place of Penetration Rods. The rods feature both male and female ends

to facilitate the connection of more than one rod.

Universal Tripod Mount—This device provides a means for mounting the laser to a photographic-type

tripod. Using this conguration, the laser beam may be directed into the bullet hole(s).

Ballistic Angle Finder—Using the Universal Tripod Mount, the Ballistic Angle Finder determines the angle

of trajectory from the vertical plane.

Stringing Tips and Colored Trajectory String—Once a Penetration Rod is positioned into the bullet hole,

a Stringing Tip may be attached to the rod. The Colored Trajectory String may then be attached to the

Stringing Tip.

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CAUTIONS/WARNINGS

• WARNING! Laser light may cause permanent eye damage. Do not look directly into the laser beam or

direct it toward others present at the scene.

• Do not look directly into the laser beam reection if it is directed toward a mirror or other highly reec-

tive surface.

• CAUTION! Do not connect more than two rods together as this added weight may damage the bullet hole.

OPERATION

Penetration Rods:

The Laser Trajectory Kit contains four Bullet Penetration Rods (aluminum-colored) that are used to mount

the Laser Pointer as well as the Multi-Colored Photographic Rods.

1. One end of each Penetration Rod is machined with a bullet-like tip to permit

easy insertion into bullet holes (Fig. 1).

2. Maneuver the bullet-tipped end of the rod into the bullet hole. Slip a Center-

ing Cone onto the rod and into the hole as deeply as it will go without undue

force. Slip an O-Ring onto the rod to hold the Centering Cone in place (Fig.

2).

3. If the projectile penetrated

the surface and the exit hole

is accessible, slip a Centering

Cone and O-Ring onto the

end of the rod as described

below (Fig. 3).

FIGURE 1

FIGURE 2—Illustration

O-RING

WALL

CENTERING CONE

PENETRATION ROD

FIGURE 3—Illustration

PENETRATION

ROD

O-RING O-RING

CENTERING

CONE

WALL

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Ballistic Laser Pointer:

The Ballistic Laser Pointer (Fig. 4) is equipped with a momentary ON/

OFF switch. To activate the beam, press the push button on the body

of the laser. For constant light, depress the button and slide the locking

collar over the switch. The Ballistic Laser Pointer may be used in two

different ways:

1. With a Photographic Rod or

Penetration Rod already in

place in a bullet hole(s), at-

tach a laser connector to the

Laser Pointer and screw it on

the other end of the rod (Fig.

5). To avoid cross-threading,

use extreme care when threading the rod into the laser as these are

extremely ne threads.

2. To use the laser to project a beam through a bullet hole, mount the

laser onto the Universal Tripod Mount using one of the Laser Con-

nectors. Attach the tripod mount onto a tripod using the pre-drilled

¼-20 mounting hole. Adjust the tripod’s height and lateral adjust-

ments until the laser beam penetrates through the bullet hole (Fig.

6).

LOCKING COLLAR

ON/OFF

FIGURE 4—Ballistic Laser Pointer

FIGURE 5

PENETRATION ROD

LASER CONNECTOR

FIGURE 6—(Tripod not included)

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Photography

Two methods are available to photograph the actual laser

beam:

Method 1: The camera should be set on a tripod and a slow

shutter speed should be used (i.e., 1/15 to 1/30 sec.). Us-

ing available light or indirect ash, introduce No. LTF100S

Photo Laser Smoke into the scene. This will make the laser

beam visible.

Method 2: Darken the room or area (Fig. 7). If outdoors, set

up for photos after dark. Set the camera on a tripod and lock

it into place. This technique is similar to painting with light.

Open the lens aperture fully and set the camera for Time

Exposure, or use the Bulb Setting, and use a locking cable

release. If only one bullet hole is in evidence, take a time

exposure of the laser beam for approximately 20* seconds. If multiple bullet holes are in evidence, cover

the camera lens with a heavy black cloth, set up the beam, and then lock the shutter open. After each time

that the laser is set up in a new bullet hole, uncover the lens for 20 seconds.

*NOTE: Use 20-seconds as a starting point. If using conventional lm, bracket exposures. If a digital cam-

era is used, the results will be apparent on the camera’s viewing screen.

FIGURE 7—Introduce Photo Laser Smoke

(LTF100S) into the scene to make laser beam

visible for photos.

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Photographic Rods:

Six Multi-Colored Photographic Rods are included to provide better contrast and easier recognition at the

crime scene.

1. Attach a Bullet Tip to one of the Multi-Colored

Photographic Rods. Insert it into a bullet hole using

the same technique described above for Penetration

Rods.

2. Photograph the scene using conventional techniques

(i.e., available light or ash).

3. String may also be attached to the rod end using a Stringing Tip (Fig. 8).

Ballistic Angle Finder:

The Ballistic Angle Finder is used to determine the angle of trajectory from the

vertical plane. It should be used with a standard tripod for best results. The

Ballistic Angle nder has a mount for the tripod and two laser pointers attached

to its base (Fig. 9).

Optional Forensic Rod Kit:

The FRK16 Optional Forensic Rod

Kit is available for use with the

LTF100 when a large number of

bullet holes are present at the crime

scene. It consists of 16 Multi-

Colored Acrylic Rods and 16 Centering Cones with a Forensic Rod Container for easy transport and storage

(Fig. 10).

FIGURE 8—Colored Trajectory String is attached to

a Photographic Rod using one of the Stringing Tips.

FIGURE 9—(Tripod not

included) FIGURE 10—FRK16 Components

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MAINTENANCE

Battery Replacement:

The Ballistic Laser Pointer requires three (3) Type L1154 batteries (included).

1. Unscrew the cap of the battery compartment located on the rear of the laser. Remove the old batteries.

2. Install three new L1154 batteries with the + terminal facing out of the battery compartment as shown in

Fig. 11 Illustration.

3. Replace the battery compartment cover.

4. Test the laser by depressing the ON/OFF button. Remember, DO NOT look directly into the laser beam.

FIGURE 11—Illustration

– + – + – +

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LTF100 KIT CONTENTS:

1- LTF101 Ballistic Angle Finder

1- LTF102 Ballistic Laser Pointer Class IIIa

w/batteries (type L1154)

1- LTF103 Bullet Penetration Rods, set of 4

1- LTF104 Multi-Colored Photographic Rods,

set of 6

2 – LTF105 Laser Connectors

1- LTF106 Bullet Tips, set of 2

1- LTF107 Stringing Tips, set of 2

1- LTF108 Centering Cones,

set of 4

1- LTF109 O-Rings, set of 4

1- LTF110 Universal Tripod

Mount w/mounting

screws

1- LTF111 Roll of Colored

Trajectory String, 250 ft.

1- LTF100C High-Impact

Carrying Case w/

Custom Foam Insert

OPTIONAL FRK16 KIT CONTENTS:

16- FRK001 Multi-Colored Acrylic Rods

16- FRK002 Centering Cones

1- FRK16C Forensic Rod Container

No. LTF100S

CAT. NO. ACCESSORY ITEMS DESCRIPTIONS

LTF100S Optional Photo Laser Smoke (aerosol

can), 8 oz. (236ml)

BM6009 Optional Heavy-Duty Tripod

LFT112RS Optional 22 Caliber Rod Set, 4 each

LFT113 Optional Reflective Yarn, 275 ft. (84m)

LFT102 Extra Laser Pointer w/locking collar

FRK16 Optional Forensic Rod Kit

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